Chemical compounds derived from acids by the elimination of a molecule of water.
Compounds used extensively as acetylation, oxidation and dehydrating agents and in the modification of proteins and enzymes.
Phthalic acid anhydrides. Can be substituted on any carbon atom. Used extensively in industry and as a reagent in the acylation of amino- and hydroxyl groups.
Used in copolymerization reactions, in the Diels-Alder(diene)synthesis, in the preparation of resins, pharmaceuticals and agricultural chemicals. It is a powerful irritant and causes burns.
A subclass of anhydrides with the general structure of dihydrofurandione. They can be substituted on any carbon atom. They modify and inhibit proteins and enzymes and are used in the acylation of amino- and hydroxyl groups.
Methylmaleic anhydrides.
Polymeric resins derived from OXIRANES and characterized by strength and thermosetting properties. Epoxy resins are often used as dental materials.
Derivatives of acetic acid with one or more fluorines attached. They are almost odorless, difficult to detect chemically, and very stable. The acid itself, as well as the derivatives that are broken down in the body to the acid, are highly toxic substances, behaving as convulsant poisons with a delayed action. (From Miall's Dictionary of Chemistry, 5th ed)
Preservative for wines, soft drinks, and fruit juices and a gentle esterifying agent.
Oligosaccharides containing two monosaccharide units linked by a glycosidic bond.
A very strong halogenated derivative of acetic acid. It is used in acid catalyzed reactions, especially those where an ester is cleaved in peptide synthesis.
A group of compounds that has the general structure of a dicarboxylic acid-substituted benzene ring. The ortho-isomer is used in dye manufacture. (Dorland, 28th ed)
Copolymer of divinyl ether and maleic anhydride that acts as an immunostimulant with antineoplastic and anti-infective properties. It is used in combination with other antineoplastic agents.
A basic science concerned with the composition, structure, and properties of matter; and the reactions that occur between substances and the associated energy exchange.
Enzymes which transfer coenzyme A moieties from acyl- or acetyl-CoA to various carboxylic acceptors forming a thiol ester. Enzymes in this group are instrumental in ketone body metabolism and utilization of acetoacetate in mitochondria. EC 2.8.3.
The composition, conformation, and properties of atoms and molecules, and their reaction and interaction processes.
A microanalytical technique combining mass spectrometry and gas chromatography for the qualitative as well as quantitative determinations of compounds.
Compounds with a 5-membered ring of four carbons and an oxygen. They are aromatic heterocycles. The reduced form is tetrahydrofuran.
A macrolide antibiotic of the oligomycin group, obtained from Streptomyces rutgersensis. It is used in cytochemistry as a tool to inhibit various ATPases and to uncouple oxidative phosphorylation from electron transport and also clinically as an antifungal agent.
A genus of gram-positive bacteria in the family Lachnospiraceae that inhabits the RUMEN; LARGE INTESTINE; and CECUM of MAMMALS.
The addition of an organic acid radical into a molecule.
The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.
Derivatives of SUCCINIC ACID. Included under this heading are a broad variety of acid forms, salts, esters, and amides that contain a 1,4-carboxy terminated aliphatic structure.
Substances used for the detection, identification, analysis, etc. of chemical, biological, or pathologic processes or conditions. Indicators are substances that change in physical appearance, e.g., color, at or approaching the endpoint of a chemical titration, e.g., on the passage between acidity and alkalinity. Reagents are substances used for the detection or determination of another substance by chemical or microscopical means, especially analysis. Types of reagents are precipitants, solvents, oxidizers, reducers, fluxes, and colorimetric reagents. (From Grant & Hackh's Chemical Dictionary, 5th ed, p301, p499)
Derivatives of formic acids. Included under this heading are a broad variety of acid forms, salts, esters, and amides that are formed with a single carbon carboxy group.
A group of elements that include SCANDIUM; YTTRIUM; and the LANTHANOID SERIES ELEMENTS. Historically, the rare earth metals got their name from the fact that they were never found in their pure elemental form, but as an oxide. In addition they were very difficult to purify. They are not truly rare and comprise about 25% of the metals in the earth's crust.
1,2-Dihydro-3,6-pyridazinedione. A herbicide and plant growth regulator; also used to control suckering of tobacco. Its residue in food and tobacco is highly toxic, causing CNS disturbances and liver damage.
Metals that constitute the group 2 (formerly group IIa) of the periodic table.
A monosaccharide in sweet fruits and honey that is soluble in water, alcohol, or ether. It is used as a preservative and an intravenous infusion in parenteral feeding.
The formation of crystalline substances from solutions or melts. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Exclusive legal rights or privileges applied to inventions, plants, etc.
The study of crystal structure using X-RAY DIFFRACTION techniques. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
The scattering of x-rays by matter, especially crystals, with accompanying variation in intensity due to interference effects. Analysis of the crystal structure of materials is performed by passing x-rays through them and registering the diffraction image of the rays (CRYSTALLOGRAPHY, X-RAY). (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
The study of the structure, preparation, properties, and reactions of carbon compounds. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Formation of an acetyl derivative. (Stedman, 25th ed)
Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.
Messages between computer users via COMPUTER COMMUNICATION NETWORKS. This feature duplicates most of the features of paper mail, such as forwarding, multiple copies, and attachments of images and other file types, but with a speed advantage. The term also refers to an individual message sent in this way.
Mechanical food dispensing machines.
The guidelines and policy statements set forth by the editor(s) or editorial board of a publication.
The profession of writing. Also the identity of the writer as the creator of a literary production.
A publication issued at stated, more or less regular, intervals.
The functions and activities carried out by the U.S. Postal Service, foreign postal services, and private postal services such as Federal Express.
A loose confederation of computer communication networks around the world. The networks that make up the Internet are connected through several backbone networks. The Internet grew out of the US Government ARPAnet project and was designed to facilitate information exchange.
Tests of chemical substances and physical agents for mutagenic potential. They include microbial, insect, mammalian cell, and whole animal tests.
Chemical agents that increase the rate of genetic mutation by interfering with the function of nucleic acids. A clastogen is a specific mutagen that causes breaks in chromosomes.
A plant genus of the family APIACEAE that is sometimes called Hemlock Water Dropwort but should not be confused with HEMLOCK. It contains enanthotoxin.
A serotype of Salmonella enterica that is a frequent agent of Salmonella gastroenteritis in humans. It also causes PARATYPHOID FEVER.

Activity in saline of phthalylated or succinylated derivatives of mycobacterial water-soluble adjuvant. (1/121)

A water-soluble fraction (WSA) of the cell wall can substitute for mycobacterial cells in Freund complete adjuvant. However, when WSA is administered in saline instead of in a water-in-oil emulsion, its adjuvant activity is very weak, and under certain experimental conditions it can even inhibit the humoral immune response. The data reported in the present study show that after treatment by phthalic or succinic anhydride the adjuvant activity of WSA was markedly changed, since high levels of circulating antibodies were produced when these derivatives were administered with an antigen in an aqueous medium. Moreover, the antigenic determinants of WSA were modified and acylated WSA had no tuberculin-like activity.  (+info)

Prevention of occupational allergy caused by exposure to acid anhydrides. (2/121)

This paper focuses on the prevention of IgE-mediated symptoms of the eyes and airways caused by exposure to acid anhydrides in the workplace. Acid anhydrides are widely used in the production of alkyd resins and as curing agents for epoxy resins. Heavy exposure to acid anhydrides causes severe irritation. However, reports of direct irritation of mucous membranes or skin are rare in recent years, since a package of multiple engineering controls has been introduced to reduce exposure. On the other hand, acid anhydrides are well-known industrial inhalant sensitizers and can cause occupational allergy even at very low exposure intensities. Therefore, safe use in industry demands both control of the level of exposure causing allergic diseases in the workshop and programmes for prevention of occupational allergy.  (+info)

Mass spectrometric analysis of platelet-activating factor after isolation by solid-phase extraction and direct derivatization with pentafluorobenzoic anhydride. (3/121)

Platelet-activating factor is the term used to denote a class of extremely potent lipid mediators that consist predominantly of 1-O-alkyl- and 1-O-acyl-2-acetyl-sn-glycero-3-phosphocholines. A method has been devised for rapid isolation of these acetylated phospholipids by solid-phase extraction prior to direct derivatization with pentafluorobenzoic anhydride and analysis by gas chromatography (GC)/electron-capture mass spectrometry. Recovery through the entire method (lipid isolation, derivatization, and purification) typically ranged from 70% to 85%. Using the direct derivatization procedure described here, the practical limit of detection for each of the standard alkyl- and acyl-platelet-activating factor homologs was 1 fmol injected into the GC. Results from the application of the method to the analysis of alkyl and acyl homologs of platelet-activating factor isolated from stimulated human umbilical vein endothelial cells are presented, exhibiting excellent accuracy and precision for a wide range of tissue levels of this class of potent autacoids.  (+info)

GCD quantitation of opiates as propionyl derivatives in blood. (4/121)

We describe a method using a gas chromatograph with electron ionization detection (GCD) for the simultaneous determination of morphine, codeine, 6-monoacetylmorphine, ethylmorphine, and dihydrocodeine in blood. The method employs propionic anhydride in the presence of triethylamine to propionylate free hydroxyl groups of the opiates in blood. The quantitation is achieved by using GCD with selected ion monitoring of the two most characteristic ions for each analyte. The quantitation limit was 0.01 mg/L and the linearity was 0.01-10 mg/L for dihydrocodeine, ethylmorphine, and 6-monoacetylmorphine. For the other investigated opiates, the quantitation limit was 0.025 mg/L and linearity was 0.025-10 mg/L. The intraday relative standard deviation (RSD) varied from 7.2 to 10% at the 0.5 mg/L level, and the day-to-day RSDs varied from 7.5 to 11% at the 0.85 mg/L level.  (+info)

Risk factors for bronchial hyperresponsiveness in workers exposed to acid anhydrides. (5/121)

Risk factors for bronchial hyperresponsiveness have previously been established in the general community. In settings where occupational asthma is a risk, it has not been established whether occupational sensitization or measures of exposure are important. Bronchial responsiveness to histamine was measured in a cohort of 506 workers exposed to acid anhydrides. Skin-prick tests were performed with conjugates of phthalic, maleic and trimellitic anhydride with human serum albumin and with common inhalant allergens. Employment and smoking histories were recorded. Occupational exposure was measured using personal air samplers and estimates of past exposure made by retrospective exposure assessment. Three hundred and seventy workers (73%) had bronchial responsiveness measured (median age 39 yrs, range 18-77) and 46 (12%) of these were hyperresponsive (provocative dose causing a 20% fall in forced expiratory volume in one second (FEV1; PD20) < or = 8 micromol). Twelve (3%) of these responsive workers had a skin-prick test reaction to an acid anhydride conjugate, 124 (34%) to a common inhalant allergen, and 148 (40%) were current smokers. Multivariate analysis showed that occupational sensitization, sensitization to a common inhalant allergen, age, and pack-years of smoking were independent risk factors for bronchial hyperresponsiveness. Of these only occupational sensitization was completely independent of baseline FEV1. It is concluded that sensitization to acid anhydrides is a significant risk factor for bronchial hyperresponsiveness. However, measures of personal acid anhydride exposure were not associated with bronchial hyperresponsiveness.  (+info)

New hemisynthetic manoyl oxide derivatives with antimicrobial activity. (6/121)

The synthesis and antimicrobial activity of ten labdane-type diterpenes derived from ent-3-beta-hydroxy-13-epi-manoyl oxide (ribenol) is reported. The chloroethyl carbamidic ester 9 showed the strongest antimicrobial activity against all the tested gram (+), gram (-) bacteria and pathogenic fungi. Moreover, the glycoside 11 exhibited an interesting activity against the three tested fungi.  (+info)

The chemical modification of alpha-chymotrypsin with both hydrophobic and hydrophilic compounds stabilizes the enzyme against denaturation in water-organic media. (7/121)

We considered alpha-chymotrypsin (CT) in homogeneous water-organic media as a model system to examine the influence of enzyme chemical modification with hydrophilic and hydrophobic substances on its stability, activity and structure. Both types of modifying agents may lead to considerable stabilization of the enzyme in water-ethanol and water-DMF mixtures: (i) the range of organic cosolvent concentration at which enzyme activity (Vm) is at least 100% of its initial value is broadened and (ii) the range of organic cosolvent concentration at which the residual enzyme activity is observed is increased. We found that for both types of modification the stabilization effect can be correlated with the changes in protein surface hydrophobicity/hydrophilicity brought about by the modification. Circular dichroism studies indicated that the effects of these two types of modification on CT structure and its behavior in water-ethanol mixtures are different. Differential scanning calorimetry studies revealed that after modification two or three fractions or domains, differing in their stability, can be resolved. The least stable fractions (or domains) have properties similar to native CT.  (+info)

Unmasking of histone amino groups in chromatin at high pH. (8/121)

The reactivity of the amino groups of histones in chromatin towards acetic anhydride was determined as a function of pH. In the pH range 7-10 the vast majority of amino groups in all five histones are buried. However, at higher pH values some of the histone amino groups become exposed, and the higher the lysine:arginine ratio for the histone the greater was the degree of unmasking observed. At pH 11.8 histone I appears to be completely dissociated, histones IIB1 and IIb2 have approx. 55% of the amino groups unmasked, and histones III and IV have approx. 25% of the amino groups unmasked.  (+info)

The invention relates to the use of an acid anhydride incorporated as a latentiated catalyst in poly(ortho ester) and other polymers such that upon exposure to aqueous environments the acid anhydride generates the corresponding acid which catalyzes the matrix erosion. The releasing rate of a loaded drug substance incorporated into or surrounded by the poly(ortho ester) or other polymers can be controlled in that the drug is released as the poly(ortho ester)s or other polymer is eroded by action of the acid anhydride incorporated therein.
The present invention provides a novel diamine and a novel acid anhydride which are applicable for a polyimide and includes a cinnamoyl group or a derived cinnamoyl group. The novel diamines and acid anhydrides have photo-reactivity and heat-reactivity inherent to the cinnamoyl group.
The report generally describes phenyl boronic acid anhydride, examines its uses, production methods, patents. Phenyl boronic acid anhydride market situation
Retrospective exposure assessment using Bayesian methods.: This paper presents the application of a Bayesian framework for retrospective exposure assessment of
Looking for chlorendic anhydride? Find out information about chlorendic anhydride. C9H2Cl6O3 White, fine crystals used in fire-resistant polyester resins, in hardening epoxy resins, and as a chemical intermediate Explanation of chlorendic anhydride
Looking for caprylic anhydride? Find out information about caprylic anhydride. 2O A white solid that melts at -1°C; used as a chemical intermediate Explanation of caprylic anhydride
Mixed anhydrides of O-benzylbenzohydroximic acid have been prepared by acylation and sulfonylation of O-benzylbenzohydroxamic acid using a variety of acyl and sulfonyl halides in the presence of trimethylamine and pyridine in dioxane and benzene. Structure elucidation of the resulting products was performed by chemical and spectroscopic methods. All evidences indicate that the products have the mixed anhydride structure with (Z)-configuration. Corresponding (E)-isomer and the isomeric N-acylated or sulfonylated products, if formed, could not be isolated. Several mixed anhydrides showed antiparasitic activity.. ...
Bis(trifluoromethyl)thiophosphinic acid, (CF3)2P(S)OH, has been prepared by the reaction of concentrated sulfuric acid with salts of the acid. The new moderately strong monothio acid is stable in aqueous solution but yields 1 mol of CF3H per mole of acid upon alkaline hydrolysis. The acid has been characterized by chemical and spectroscopic methods including gas-phase infrared spectra which suggest that the acid has the (CF3)2P(S)OH structure. Dehydration of the acid with P4O10 proceeds smoothly to give good yields of the anhydride, ((CF3)2P(S))2O, which is extremely inert toward electrophilic reagents such as hydrogen halides and hydrogen sulfide. The infrared and nmr spectral properties of the acid and its anhydride are discussed. The anhydrides reactions are also discussed.(*ORGANIC PHOSPHORUS COMPOUNDS
term_id nAnno nGroup nOverlap zscore pvalue adjp GO:0016866 GO:0016866 11 73 3 2.18 0.011 0.3 GO:0050112 GO:0050112 20 73 4 1.79 0.025 0.3 GO:0016787 GO:0016787 112 73 15 1.85 0.026 0.3 GO:0016746 GO:0016746 14 73 3 1.68 0.028 0.3 GO:0004022 GO:0004022 21 73 4 1.68 0.031 0.3 GO:0015002 GO:0015002 38 73 6 1.56 0.042 0.3 GO:0004518 GO:0004518 16 73 3 1.42 0.044 0.3 GO:0016817 GO:0016817 31 73 5 1.47 0.047 0.3 GO:0016818 GO:0016818 31 73 5 1.47 0.047 0.3 GO:0016462 GO:0016462 31 73 5 1.47 0.047 0.3 term_name GO:0016866 intramolecular transferase activity GO:0050112 inositol 2-dehydrogenase activity GO:0016787 hydrolase activity GO:0016746 transferase activity, transferring acyl groups GO:0004022 alcohol dehydrogenase (NAD) activity GO:0015002 heme-copper terminal oxidase activity GO:0004518 nuclease activity GO:0016817 hydrolase activity, acting on acid anhydrides GO:0016818 hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides GO:0016462 pyrophosphatase activity ...
2-DECEN-1-YLSUCCINIC ANHYDRIDE 25447-83-0 Precursor and Downstream products, 2-DECEN-1-YLSUCCINIC ANHYDRIDE Precursor products, 2-DECEN-1-YLSUCCINIC ANHYDRIDE Downstream products ect.
5-Fluoroisatoic Anhydride 321-69-7 NMR spectrum, 5-Fluoroisatoic Anhydride H-NMR spectral analysis, 5-Fluoroisatoic Anhydride C-NMR spectral analysis ect.
PubMed comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.
cis-5-Norbornene-exo-2,3-dicarboxylic anhydride, 95%, ACROS Organics™ 5g; Glass bottle cis-5-Norbornene-exo-2,3-dicarboxylic anhydride, 95%, ACROS...
A coating composition useful for a finish for automobiles and trucks in which the film forming binder contains reactive binder components of about (a) 25-94% by weight, based on the weight of the binder, of an acrylic polymer having at least two reactive anhydride groups composed of polymerized monomers of an ethylenically unsaturated anhydride and polymerized monomers from the group consisting of alkyl methacrylate, alkyl acrylate and any mixtures thereof, wherein the alkyl groups have 1-8 carbon atoms and the polymer has a weight average molecular weight of about 2,000-50,000; (b) 5-50% by weight, based on the weight of the binder, of a glycidyl component having at least two reactive glycidyl groups; (c) 1-40% by weight, based on the weight of the binder, of a self-stabilized dispersed resin; and the composition contains about 0.1-5% by weight; based on the weight of the binder, of a catalyst.
Looking for 4,4-Oxydiphthalic Anhydride Odpa Cas: 1823-59-2, 1,4-Bis(3-Aminophenoxy)benzene (Tpe-R) Cas: 59326-56-6 products & leads in High Polymers, contact Chinatech (Tianjin) Chemical Co., Ltd to buy 4,4-Oxydiphthalic Anhydride Odpa Cas: 1823-59-2, 1,4-Bis(3-Aminophenoxy)benzene (Tpe-R) Cas: 59326-56-6 products and find useful product information on Toboc.
Authentic & verified Glycine anhydride Export data for market research & supply chain analysis of Glycine anhydride Export trade, view 102 Export shipments from bill of entry filed at over 64 countries customs.
4124-31-6 Trichloroacetic anhydride testing. Laboratory testing for CAS number 4124-31-6. Trichloroacetic anhydride. This chemical is colourless liquid
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[150 Pages Report] Check for Discount on 2016 Tetrahydrophthalic anhydride (THPA) (CAS 935-79-5) Industry Market Report report by Prof Research. The Global and Chinese Tetrahydrophthalic anhydride (THPA) Industry, 2011-2021...
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TY - JOUR. T1 - XXXII. - Action of phosphoric anhydride on fatty acids. Part I. AU - Kipping, F. Stanley. PY - 1890. Y1 - 1890. U2 - 10.1039/CT8905700532. DO - 10.1039/CT8905700532. M3 - Literature review. VL - 57. SP - 532. EP - 540. JO - Journal of the Chemical Society, Transactions. JF - Journal of the Chemical Society, Transactions. SN - 0368-1645. ER - ...
Page contains details about poly(iso-butylene-alt-maleic anhydride/succinic amides)-coated dodecanethiol-stabilized gold nanoparticles in TBE buffer . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
نسخه قابل چاپ خلاصه مقاله Statistical Process Optimization of poly(bis(2-hydroxyl ethyl) terephthalate-Maleic Anhydride)from PET - گواهی پذیرش مقاله در کنفرانس
4-Thiazoleacetic acid,alpha-[(acetyloxy)imino]-2-amino-,anhydride with diethyl hydrogen phosphate,(Z)-/ACM205307524 can be provided in Alfa Chemistry. We are dedicated to provide our customers the best products and services.
Joosten, Mathew W., Agius, Steven, Hilditch, Tim and Wang, Chun 2017, Effect of residual stress on the matrix fatigue cracking of rapidly cured epoxy/anhydride composites, Composites part A: applied science and manufacturing, vol. 101, pp. 521-528, doi: 10.1016/j.compositesa.2017.07.007. ...
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Dissolution of paracetamol crystallized in the presence of poly(vinyl acetate-co-maleic anhydride), DA Raval, DN Parikh, VM Patel
Buy 3-(4-Chlorophenyl)glutaric Anhydride (CAS 53911-68-5), a product for proteomics research, from Santa Cruz Biotechnology. MF: C11H9ClO3, MW: 224.64
All metallic oxides that react with water to form a base solution are considered basic anhydrides, including lithium, magnesium, sodium and calcium oxides. Only the oxides formed by the alkali metals...
Sigma-Aldrich offers Aldrich-441570, (R)-(+)-2-Acetoxysuccinic anhydride for your research needs. Find product specific information including CAS, MSDS, protocols and references.
Hexahydro-4 methylphthalic anhydride (4 -MHHPA) was examined for its possible prenatal developmental toxicity in a GLP compliant study according to OECD 414. Groups of 26 sperm-positive female Hsd. Han: Wistar rats were treated with the test item by oral administration daily at three dose levels of 80, 240 and 460 mg/kg bw/day respectively from day 5 up to and including day 19 post coitum. A control group of 26 sperm positive females was included and the animals were given the vehicle sunflower oil. During the study, mortality was checked and clinical observations were performed. The body weights and food consumption of the dams were also recorded. The day when sperm was detected in the vaginal smear was regarded as day 0 of gestation. Caesarean section and gross pathology were performed on gestational day 20. The number of implantations, early and late resorptions, live and dead fetuses in each uterine horn and the number of corpora lutea were recorded. Each fetus was weighed and examined for ...
[65 Pages Report] Check for Discount on tetrafluorophthalic anhydride Global Market and Forecast Research report by ChemReport. DescriptionWe provide independent and unbiased information on manufacturers, prices, production...
The glutaconic acids are substances possessing a highly mobile three carbon tautomeric system. They also exhibit geometrical isomerism and, in the case of the symmetrically di-substituted acids, optical isomerism as well. Glutaconic acid has the trans configuration, but readily yields an anhydride which on careful hydration forms the unstable cis-acid (Malachowski, Ber., 1929, 62, (B) 1323). This is explained by the high mobility of the system which results in isomerisation from the trans to the cis form as a preliminary step in anhydride formation. ...
There is provided an underlayer coating forming composition for lithography that is used in lithography process of manufacture of semiconductor device; and an underlayer coating having a high dry etching rate compared with photoresist. Concretely, it is a composition for forming an underlayer without use of crosslinking reaction by an strong acid catalyst, and an underlayer coating forming composition containing a component having an epoxy group (a polymer, a compound) and a component having a phenolic hydroxyl group, a carboxyl group, a protected carboxyl group or an acid anhydride structure (a polymer, a compound).
Characteristics of organic compounds analysis. The methodology of the analysis, development and trends. Determination of physical constants: melting and boiling point, refractivity, optical activity, partition coefficients of extraction, molecular weight, spectral constants. Determination of purity, purification of sample. Elemental analysis. Sample decomposition, detection and determination of C, H, O, N, Cl, Br, I, S, P, F. Automatic methods of elemental analysis. Functional groups identification: classes of dissolution, classification reactions for carbohydrates, alcohols, phenols, aldehydes, ketones, carboxylic acids, acid anhydrides, esters, amides, imides, ethers, epoxides, peroxides, amines, hydroxylamines, nitriles, isocyanides, nitro-, nitroso-, azo-, azoxy-, hydrazo- and diazocompounds, thiols, sulphonic and sulphinic acids and their derivatives, halogen compounds. Methods and procedures for identification of organic compounds. Determination of organic compounds based on their ...
English Translation of naphtaline , Collins French-English ... English Translation of naphtaline , The official Collins French-English Dictionary online. Over 100,000 English translations of French words and phrases. Define mothball. mothball synonyms, mothball pronunciation, mothball translation, English dictionary definition of mothball. ... etc) out of operation but maintain it ... Fujifilm Instax Mini 9 User Manual Have a look at the manual Fujifilm Instax Mini 9 User Manual online for free. Its possible to download the document as PDF or print. UserManuals.tech offer 17 Fujifilm manuals and users guides for free. US3507810A - Catalyst for oxidation of naphthalene to ... US3507810A - Catalyst for oxidation of naphthalene to phthalic acid anhydride - Google Patents. durée : 00:05:44 - Tanguy Pastureau maltraite linfo - par : Tanguy Pastureau - Les sondages de France Inter sont exceptionnels, 6 millions de gens écoutent cette radio tous les jours, 120 millions selon la CGT Radio ...
vacuolar ATP synthase subunit B, putative / V-ATPase B subunit, putative / vacuolar proton pump B subunit, putative / V-ATPase 57 kDa subunit, putative; FUNCTIONS IN: hydrogen ion transporting ATP synthase activity, rotational mechanism, hydrolase activity, acting on acid anhydrides, catalyzing transmembrane movement of substances, proton-transporting ATPase activity, rotational mechanism; INVOLVED IN: proton transport, ATP metabolic process, ATP synthesis coupled proton transport; LOCATED IN: plasma membrane, vacuole, membrane, chloroplast envelope; EXPRESSED IN: 27 plant structures; EXPRESSED DURING: 15 growth stages; CONTAINS InterPro DOMAIN/s: ATPase, F1/V1/A1 complex, alpha/beta subunit, C-terminal (InterPro:IPR000793), ATPase, F1/V1/A1 complex, alpha/beta subunit, N-terminal (InterPro:IPR004100), ATPase, F1/V1/A1 complex, alpha/beta subunit, nucleotide-binding (InterPro:IPR000194), ATPase, V1 complex, subunit B (InterPro:IPR005723); BEST Arabidopsis thaliana protein match is: vacuolar ATP ...
CGS 27830 [meso-1,4-dihydro-5-methoxycarbonyl-2,6-dimethyl-4-(3- nitrophenyl)-3-pyridine carboxylic acid anhydride] is a nonpeptidic, insurmountable, endothelin (ET) receptor antagonist with approximately 10- to 20-fold selectivity for ETA receptors. CGS 27830 exhibits unusual binding properties which depend on the receptor and ligand: standard saturation binding experiments (coincubation of membranes with ligand in the absence or presence of antagonist) suggest that CGS 27830 is a competitive inhibitor of [125I]IRL 1620 binding to ETB receptors in rat cerebellar membranes (i.e., there was a change of apparent Kd with no change of maximum binding), but a noncompetitive inhibitor of [125I]IRL 1620 binding to ETB receptors in rat lung membranes (i.e., significant loss of total binding was observed). Although the antagonist appears to be a noncompetitive inhibitor of [125I]IRL 1620 binding to ETB receptors in rat lung membranes, CGS 27830 appears to be a competitive inhibitor of [125I]ET-1 binding ...
Aldrich-697443; 1-(Phenylsulfonyl)-2-indolylboronic acid MIDA ester 0.96; CAS No.: 1158984-95-2; Synonyms: 1-(Phenylsulfonyl)indole-2-boronic acid; 1-(Phenylsulfonyl)indole-2-boronic acid MIDA ester; Methyliminodiacetic acid anhydride; Linear Formula: C19H17BN2O6S
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Millions of active and retired military and civilian personnel contractors and other parties could face financial hardships if the Defense Finance and Accounting Service (DFAS) does not fix its Year 2000 computer problems according to a report issued last week by the General Accounting Office. In a
Conjugates of testosterone-3-carboxymethyloxime (T-3-CMO), testosterone-17-hemisuccinate (T-17-HS), 17 beta-estradiol-6-carboxymethyloxime (E-6-CMO), or 17 beta-estradiol-17-hemisuccinate (E-17-HS) and bovine serum albumin (BSA) with varying steroid:protein ratios were prepared using the mixed anhydride method. Dialysis followed by molecular filtration yielded monomer steroid-BSA conjugates with a molecular weight of 70,000 dalton, and polymer conjugates with molecular weights of 140,000 dalton and higher. When conjugates were prepared with increasing initial steroid:BSA molar ratios the ratio of the obtained conjugates increased, in parallel with a decrease in the relative amount of monomers and an increase in the mean molecular size of polymers. The molecular properties of these conjugates were studied further by polyacrylamide gel electrophoresis (PAGE) in native and denaturing conditions. In native PAGE the monomer fractions showed one main band with a mobility slightly lower than BSA and a faint
alternative to amitriptyline for ibs Pfleiderâ  s revised total debt of $1,098.87 was less than the $1,533 the Treasury had already collected from him on behalf of DFAS. After accounting for other, smaller underpayments to Pfleider, as well as interest and penalties, DFAS said his final total debt came to $815.50 â  or only about 25 percent of what it had claimed when it started sending bills to him. DFAS deducted that from the $1,533 it already had collected and in mid-April, a month after Reuters inquired about his case, paid him the balance of $717.50 ...
I want to make a quick correction to the last video where we introduced the carboxylic acid videos, and then we can actually compare them in terms of
For REACH substances, inclusion in the list means that an informal hazard assessment for PBT/vPvB properties either is under development or has been completed since the start of the implementation of the SVHC Roadmap in February 2013. For each substance, the table shows the assessing or evaluating Member State (submitter), the outcome and the suggested follow-up from the assessment, and the date of the latest update to the list entry. Other process details and hazard assessment outcome documents are also available and can be accessed through the Details icon. One possible outcome of such an assessment is that a substance is considered not to have PBT/vPvB properties. If the outcome is that the substance is considered to have PBT/vPvB properties, confirmation through the formal risk management and decision-making processes under REACH/BPR is needed before any regulatory action can be taken due to these properties. The intentions of authorities to submit a dossier to the formal REACH and CLP ...
This list contains biological and chemical agents, in accordance with Art. 7 and points 2 and 3 of the Annex to Directive 94/33/EC, to which young persons (under 18 years of age) may not be exposed at the workplace. The database represents a non-exhaustive list of such substances based on: 1) agents of risk groups 3 and 4 under Directive 2000/54/EC; 2) Table 3 of Annex VI to the CLP Regulation; 3) and Annex I of Directive 2004/37/EC.. ...
Succinic anhydride can be expected to have a low potential for bioaccumulation (due to low log Pow). Information regarding the toxicokinetics and percutaneous absorption of cyclic anhydrides is available in the published literature. Toxicokinetics data on hexahydrophthalic anhydride and phthalic anhydride indicate that cyclic anhydrides are readily hydrolysed to the corresponding dicarboxylic acid, which is mainly excreted in the urine and to a lesser extent in expired air after exposure via the inhalation route. Cyclic anhydrides share structural and physicochemical properties such that following inhalation exposure. The hydrolysis product of succinic anhydride is succinic acid, an endogenous substance and food ingredient that is expected to be effectively excreted in urine. A separate toxicokinetics study on succinic anhydride is not proposed and cannot be justified based upon animal welfare considerations. Percutaneous absorption of cyclic anhydrides was investigated using hexahydrophthalic ...
Acetic anhydride is an esterification agent for use in prepn. of modified food starch and for acetylation of monoglycerides Acetic anhydride is a versatile reagent for acetylations, the introduction of acetyl groups to organic substrates. In these conversions, acetic anhydride is viewed as a source of CH3CO+. Alcohols and amines are readily acetylated. For example, the reaction of acetic anhydride with ethanol yields ethyl acetate: (CH3CO)2O + CH3CH2OH → CH3CO2CH2CH3 + CH3COOH. Acetic anhydride is an irritant and flammable. Because of its reactivity toward water, alcohol foam or carbon dioxide are preferred for fire suppression. The vapour of acetic anhydride is harmful. Acetic anhydride is the chemical compound with the formula (CH3CO)2O. Commonly abbreviated Ac2O, it is one of the simplest acid anhydrides and is a widely used reagent in organic synthesis. It is a colorless liquid that smells strongly of acetic acid, which is formed by its reaction with the moisture in the air. As indicated ...
The single dose oral toxicity of succinic anhydride in Sprague-Dawley rats was reported as 1794.9 mg/kg bw for males and females. The acute dermal median lethal dose for succinic anhydride was found to exceed the limit dose level in rats, ,2000 mg/kg bw. Clinical signs included reduced appetite and activity, increasing weakness, collapse and death inalbino rabbits following acute dermal administration of maleic anhydride. The LD50 is between 1600 and 2600 mg/kg/day. Macroscopic evaluation showed enlarged gall bladder, discoloration of spleen and kidneys, and gastrointestinal inflammation. Similar results would be expected with succinic anhydride Acute inhalation testing is not required. The results of the granulometry indicate the L10 value for particle size was 377 µm and the L50 was greater than 1100 µm. On the basis of these results only a very small part of the particles in the batch of succinic anhydride may be smaller than 100 µm and may be respirable. The lager part of the particles ...
TY - JOUR. T1 - Formation of citraconic anhydride via condensation of dialkyl succinates and formaldehyde. AU - Shekhawat,Dushyant. AU - Nagarajan,Kirthivasan. AU - Jackson,James E.. AU - Miller,Dennis J.. PY - 2002. Y1 - 2002. N2 - The formation of citraconic anhydride (CAN) from the condensation of succinic acid and its derivatives with formaldehyde over oxide catalysts is described. Alumina and aluminum phosphate are active catalysts that give selectivity to citraconic anhydride as high as 75% in an integral fixed bed reactor. Weakly acidic sites on the catalyst surface, particularly Lewis acid sites, are responsible for activating the desired reaction pathway. Strongly acidic sites lead to cracking and coking, while basic sites facilitate the Cannizzaro reaction of formaldehyde to carbon dioxide and methanol. Catalyst deactivation via coking occurs over the course of reaction, but activity is easily restored by regeneration in air at elevated temperatures. The reaction system under ...
Define acetic anhydride. acetic anhydride synonyms, acetic anhydride pronunciation, acetic anhydride translation, English dictionary definition of acetic anhydride. n a colourless pungent liquid used in the manufacture of cellulose and vinyl acetates for synthetic fabrics. Formula: 2O n. a colorless, pungent liquid,...
Acetic anhydride, is a colorless liquid, primarily used in the manufacturing of cellulose acetate. Cellulose acetate is used in production of several products, such as cigarette filters, textile fibers and plastic goods. In addition, acetic anhydride is used for production or manufacturing of resins & polymers, artificial sweeteners, TAED, explosives, agrochemicals, coating materials and others. Acetic anhydride is used to manufacture tetraacetylethylenediamine (TAED), which is utilized as a bleach activator in laundry and cleaning industry. Similarly, acetic anhydride, in addition to its several other applications, is used often in the form of derivatives or sources, amongst which cellulose acetate is the most widely used derivative.. Cigarette filters, occupy the largest share in volume, since their tar and nicotine removal rate goes up to 50%, higher than other compounds such as phenols. Thus, cellulose acetate contributes to more than half of the world acetic anhydride market. The demand for ...
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TY - JOUR. T1 - Possibilities of the application of polyisobutenyl succinic anhydride derivatives of various molecular structures. AU - Kocsis, Z.. AU - Baladincz, J.. AU - Bartha, L.. AU - Hancsók, J.. PY - 2001/12/1. Y1 - 2001/12/1. N2 - Detergent-dispersant (DD) effect is one of the most important properties of lubricants and fuels. To ensure these properties various types of additives are used in increasing amount in the performance additive packages. Among them ashless types and mostly polyalkenyl succinic anhydride derivatives are applied in high volumes. In this paper the main advantages of the ashless additives are presented showing the dependence of their properties on the molecule structure (monosuccinimides, bissuccinimides, mixtures thereof and polysuccinimide). Additionally, the interactions with other additives are shown which can determine the main tribological properties of the lubricants.. AB - Detergent-dispersant (DD) effect is one of the most important properties of ...
TY - JOUR. T1 - Reversible acylation and inhibition of aggregation of platelets by substituted maleic anhydrides. AU - Walder, J. A.. AU - Hyman, B. T.. AU - Heller, M. J.. AU - Shishido, R. Y.. AU - Klotz, I. M.. PY - 1977/12/1. Y1 - 1977/12/1. N2 - The antiprostaglandin action of aspirin due to the acetylation of the enzyme prostaglandin synthetase is manifested by inhibition of the so-called release reaction and consequent abolition of secondary-phase aggregation. The maleic anhydrides, a series of reversible acylating agents, have now been shown to produce the aspirin-type defect in platelet aggregation. The antiplatelet effect of aspirin is irreversible. With 2,3-dimethylmaleic anhydride, however, the antiplatelet effect disappeared in approximately 80 min at 25°. Hence the persistence of the lesion when caused by aspirin results from the stability of the acetyl linkage formed in its reaction with prostaglandin synthetase. This suggests that the modification occurs at either a lysine or an ...
TY - JOUR. T1 - Neurogenic goblet cell secretion and bronchoconstriction in guinea pigs sensitised to trimellitic anhydride. AU - Hayes, James P.. AU - Kuo, Han Pin. AU - Rohde, Juliette A.L.. AU - Newman Taylor, Anthony J.. AU - Barnes, Peter J.. AU - Fan Chung, K.. AU - Rogers, Duncan F.. PY - 1995/1/13. Y1 - 1995/1/13. N2 - Trimellitic anhydride is a cause of occupational asthma in humans. We have previously found that tracheal instillation of trimellitic anhydride conjugated to guinea pig serum albumin induces acute bronchoconstriction and airway plasma exudation in sensitised animals, responses mediated primarily via histamine release. In the present study, neural mechanisms mediating bronchoconstriction and goblet cell secretion were determined in trimellitic anhydride-sensitised guinea pigs using the ganglionic blocker hexamethonium to eliminate efferent reflex mechanisms, pretreatment with capsaicin to eliminate afferent mechanisms, or cimetidine and mepyramine to eliminate ...
Maleic anhydride is the organic compound which is the maleic acids acid anhydride. It is produced in large quantities for the coatings and polymers applications.
As indicated by its organic chemistry, Acetic anhydride is mainly used for acetylations leading to commercially significant materials. Its largest application is for the conversion of cellulose to cellulose acetate, which is a component of photographic film and other coated materials, and is used in the manufacture of cigarette filters. Similarly it is used in the production of aspirin (acetylsalicylic acid), which is prepared by the acetylation of salicylic acid.[19] It is also used as a wood preservative via autoclave impregnation to make a longer-lasting timber. In starch industry, acetic anhydride is a common acetylation compound, used for the production of modified starches (E1414, E1420, E1422) Because of its use for the synthesis of heroin by the diacetylation of morphine, acetic anhydride is listed as a U.S. DEA List II precursor, and restricted in many other countries.[20]. ...
Im not sure, but I think that its possible that I prepared acetic anhydride by accident today. I mixed 164g CH3COONa (contaminated with a small amount of NaHCO3, around 1-2g) with 75g 94% H2SO4. I then poured that into a flask; began heating it, and condensing the vapors (typical distillation). I noticed a very strange, sickly-sweet odor; very difficult to describe. I got a whiff of a very small amount of it, causing me to choke for a few moments. The condensed liquid (which I got 22mL of, if I remember correctly) was still liquid, showing no signs of imminent freezing, at -10C. Now, if that had been acetic acid, it would have frozen at a far higher temperature than that... acetic anhydride, on the other hand, would not freeze until the temperature was FAR lower. Im postulating that the following reactions were occuring, forming at least a fair-sized quantity of acetic anhydride (there is probably a significant amount of acetic acid remaining). Keep in mind that there was a slight ...
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Maleic Anhydride (Maleic Anhydride) is an intermediate chemical, produced from oxidation of benzene using a special catalyst.. Maleic Anhydride is a versatile chemical that is needed in almost all fields of the chemical industry. The use of Maleic Anhydride varies due to the structure of the di carboxylic acid group, double bond reactivity between alpha and beta positions. This chemical structure and the high reactivity of the Maleic Anhydride derivative make it possible to make various types of resins and also organic reagents for various chemical transformations.. ...
See interactive Succinic Anhydride price trend charts - free samples available. Our Specialty Price Trends covers +130 specialties, in main world regions.
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Random polymerization by radical mechanisms is probably the most common, and takes place in head to tail fashion, predominately about the alkene double bonds, to make the sp3 bonded carbons. Try visualizing the styrene polymer, first and then see how one maleic anhydride can disrupt that regular polymer coil ...
91722-16-6 - Soybean oil, mixed esters with maleic anhydride and pentaerythritol, reaction products with dicyclopentadiene - Searchable synonyms, formulas, resource links, and other chemical information.
Research Report on Asia-Pacific Maleic Anhydride(MAH) Market Report 2017. The Report includes market price, demand, trends, size, Share, Growth, Forecast, Analysis & Overview.
1. Bernstein, D.I., Patterson, R. et Zeiss, C.R., «Clinical and immunologic evaluation of trimellitic anhydride and phthalic anhydride exposed workers using a questionnaire with comparative analysis of enzyme-linked immunosorbent and radioimmunoassay studies.» Journal of Allergy and Clinical Immunology. Vol. 69, no. 3, p. 311-318. (1982). [AP-022699 ...
China Tatrabromophthalic Anhydride Polyester Flame Retardant, Find details about China Anhydride, 4 5 6 7-Tetrabromo-1 3-Isobenzofurandione from Tatrabromophthalic Anhydride Polyester Flame Retardant - NANJING GUOCHEN CHEMICALS CO., LTD.
Global Styrene-Maleic Anhydride Copolymer Market is a professional and in-depth study on the current state of the industry. The report provides a basic overview of the Styrene-Maleic Anhydride Copolymer market including definitions, classifications, applications and industry chain structure. This report also states import/export consumption, supply and demand figures, cost, price, revenue and gross margins, and the global market size (volume and value).. Access complete report at: https://www.themarketreports.com/report/2017-global-styrene-maleic-anhydride-copolymer-industry-depth-research-report. Key companies profiled in this report are Polyscope Polymers, Total Cray Valley (Tcv), Ineos, Sinopec, Baoding Lucky Chemical, Yinxin Chemical, Kaixin Fine Chemical more in terms of basic information, product categories, Sales (Volume), Revenue (Million USD), Price (USD/Unit) and Gross Margin (%) (2012-2017).. Global Styrene-Maleic Anhydride Copolymer Market Report covers Alternate Styrene-Maleic ...
polyoxyethylene (2-methyl-2-propenyl) methyl diether-maleic anhydride copolymer: comb-shaped copolymer of PEG derivative and maleic anhydride; mol wt 100,000; structure of comb-shaped copolymers given in first source
Mass spectrometry of heterocyclic compounds. XVIII. New secondary metabolites of Aspergillus wentii Wehmer. The positive and negative ion mass spectra produced by electron impact. Selva, A.; Traldi, P.; Camarda, L.; Nasini, G. Biomedical Mass Spectrometry (1980), 7(4), 148-52.. ...
To date, no credible buyers have been identified and no offers for acquiring these facilities were made. Therefore, Celanese said Monday that it will begin discussions concerning the possible closure of both the acetic anhydride facility in Roussillon and the VAM production unit in Tarragona. This action is initiated to safeguard the competitiveness of the Celanese acetyl business. The need for these contemplated projects emerged from an assessment of Celanese s overall corporate strategy, which included an assessment of the company s global manufacturing facilities. Specifically, in support of the company s acetyl portfolio, the manufacturing footprint strategy favors integrated production sites that provide critical economies of scale. Celanese subsidiaries that operate these facilities expect to soon begin the consultation process with local employee representatives to mitigate the social impact of the closures to the best possible extent.. ...
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The reaction between acetic anhydride and water is written as follows: (CH3CO)2O + H2O --| 2CH3COOH. This reaction produces two molecules of etanoic acid, a compound that appears as a colorless...
290924807 - EP 1124893 B1 2004-12-22 - POLYISOCYANATE POLYADDITION PRODUCTS - [origin: DE19928676A1] Polyisocyanate poly-addition products contains: (i) hydrophobic compounds; (ii) cyclic organic compounds; (iii) certain metal salts; (iv) acid anhydrides; (v) cyclic sulfonic acid esters or sulfones; (vi) lactones, lactams or cyclic esters; and/or (vii) alpha , beta -unsaturated carboxylic acids, acid derivatives, ketones and/or aldehydes. Polyisocyanate poly-addition products (I) containing hydrophobic compounds and other compound(s) selected from: (i) cyclic organic compounds with mol. wts. of 200-3000; (ii) salts of Sub-Group I, II and/or VIII metals; (iii) organic and/or inorganic acid anhydrides; (iv) cyclic sulfonic acid esters or sulfones; (v) lactones, lactams or cyclic esters; and/or (vi) alpha , beta -unsaturated carboxylic acids and their derivatives and alpha , beta -unsaturated ketones and/or aldehydes. Independent claims are also included for: (a) a process for the production of (I)
Gantrez™ AN polymers are synthetic, alternating copolymers of methyl vinyl ether (MVE) and maleic anhydride available in a range of molecular weights. Although the anhydride polymers (AN grades) are not directly useable in oral care products, they are used as base polymer for making polymer salts used as bioadhesives in denture adhesive applications. When Gantrez™ AN polymers anhydrides are dispersed in water, the anhydride side-chain hydrolyzes to produce free diacid solutions that are directly useable in oral care products. Gantrez™ polymer diacids are available as Gantrez S polymers. Applications:. ...
It can be seen from the phthalic anhydride price trend chart that the phthalic anhydride market stopped falling and recovered in October, and the phthalic anhydride price rose by 2.94%. The phthalic anhydride market rose, which was good for the o-benzene market, and the downstream demand for o-phthalic anhydride rose, and the driving force for the price rise of o-phthalic anhydride increased.. Future forecast:. According to Bai Jiaxin, an o-xylene data analyst from business agency, in October, the prices of raw materials for o-benzene rose slightly, while the prices of phthalic anhydride and plasticizer in the downstream sector rose, and the market of downstream industrial chain of o-benzene increased, and the momentum of o-benzenes rise was sufficient, which was beneficial to the market of o-benzene. Generally speaking, the market of o-benzene has sufficient momentum to rise, the market of o-benzene is strong, and the price is strong and stable temporarily.. ...
Water insoluble polycaprolactone-epoxide adducts are produced comprising the reaction product of a polycaprolactone polyol, a diepoxide and an anhydride of a polycarboxylic acid. The polycaprolactone polyol reacted with the diepoxide and the anhydride of the polycarboxylic acid has at least two hydroxyl groups in the molecule, a hydroxyl number of from about 15 to about 600 and an average molecular weight of from about 290 to about 6,000. The carboxylic acid anhydride has at least one intramolecular carboxylic anhydride group. These water insoluble polycaprolactone-epoxide adducts on reaction with an inorganic or organic base produce water soluble, carboxyl modifier polycarprolactone-epoxide oligomer addition reaction products which are eminently suitable for the production of aqueous coatings compositions. Exceptionally good coatings compositions are obtained when a crosslinker is present in the coating composition.
An epoxy material suitable for no-flow underfilling processes with high glass transition temperature can be obtained by curing a solvent free formulation containing an epoxy resin, an organic carboxylic acid anhydride hardener, a curing accelerator, a fluxing agent, a viscosity controlling agent, a coupling agent, and a surfactant.
Grade: Biotech Appearance Fine, white homogeneous powder Moisture content ≤10% Gel Strength 1.5% ≥1,120 g/cm2 Gelling Point 34.5 - 37.5°C Electroendosmosis-Mr 0.09-0.13 Sulfate ≤0.15% DNase , RNase and protease None detected ...
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice ...
Poly P is a linear polymer that consists of a variable number of phosphate residues (from three to more than a thousand) that are linked by energy-rich phosphoanhydride bonds. It occurs ubiquitously in all living cells and regulates many molecular and biological processes. Nevertheless, poly P is scarcely studied and little is known about poly P metabolism and its exact molecular functions; especially in eukaryotes. In our group we have developed methods to quantify poly P, to stain and localize poly P and to screen for poly P binding proteins. We are using these tools to investigate poly P metabolism and functions in fungi, plants and algae. However, at the moment our main efforts are devoted to the study of poly P metabolism in the yeast Saccharomyces cerevisiae and of poly P in fungal cell walls. ...
High-polymeric inorganic polyphosphates were found in living organisms by L. Liberman in 1890. These compounds are linear polymers containing a few to several hundred residues of orthophosphate linked by energy-rich phosphoanhydride bonds. Previously, it was considered either as molecular fossil or as only a phosphorus and energy source providing the survival of microorganisms under extreme conditions. These compounds are now known to also have regulatory roles, and to occur in representatives of all kingdoms of living organisms, participating in metabolic correction and control on both genetic and enzymatic levels. Polyphosphate is directly involved in the switching-over of the genetic program characteristic of the exponential growth stage of bacteria to the program of cell survival under stationary conditions, a life in the slow line. They participate in many regulatory mechanisms occurring in bacteria: ...
The present invention relates to processes for controlling the formation and deposition of scale and sludge and in particular calcium phosphate which would otherwise occur in aqueous mediums containing sludge and the ions capable of forming scale. The invention, more particularly, relates to the control, reduction and/or prevention of scale and sludge deposits in cooling water, scrubber and steam generating systems, evaporators, economizers, and the like by the introduction of a copolymer comprising sulfonated styrene and maleic anhydride moieties to the water used therein. The copolymers discovered to be particularly effective for the purpose are those having a mole ratio of sulfonated styrene moieties to moieties derived from maleic anhydride of from about 2:1 to about 4:1 and preferably 2:1 to 3:1 with certain type deposits.
A photoimageable composition, useful as a photoresist for forming a printed circuit board, is both alkaline aqueous developable but, subsequent to exposure and development, is processable in highly alkaline environments, such as additive plating baths and ammoniacal etchants. The photoimageable composition is tack-free and is resistance to polymerization inhibition by oxygen, and is therefore particularly suitable for contact printing. The photoimageable composition comprises A) between about 25 and about 75 wt % of a binder polymer, B) between about 20 and about 60 wt % of a photopolymerizeable material which is a multifunctional photopolymerizeable monomer or short chain oligomer, and C) between about 2 and about 20 wt % of a photoimageable chemical system, the weight percentages being based on the total weight of components A)-C). The improvement is the use in the photoimageable composition of a binder polymer A) which is a styrene/maleic anhydride copolymer in which the incorporated maleic anhydride
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Video articles in JoVE about acetic anhydrides include Consensus Brain-derived Protein, Extraction Protocol for the Study of Human and Murine Brain Proteome Using Both 2D-DIGE and Mini 2DE Immunoblotting, Customization of Aspergillus niger Morphology Through Addition of Talc Micro Particles, Chick Heart Invasion Assay for Testing the Invasiveness of Cancer Cells and the Activity of Potentially Anti-invasive Compounds, The Use of the Ex Vivo Chandler Loop Apparatus to Assess the Biocompatibility of Modified Polymeric Blood Conduits, Foraging Path-length Protocol for Drosophila melanogaster Larvae, Recombinant Protein Expression, Crystallization, and Biophysical Studies of a Bacillus-conserved Nucleotide Pyrophosphorylase, BcMazG, Analysis of LINE-1 Retrotransposition at the Single Nucleus Level, Evaluating In Vitro DNA Damage Using Comet Assay, Non-Invasive Model of Neuropathogenic Escherichia coli Infection in the Neonatal Rat, Measurement of Basal and Forskolin-stimulated Lipolysis
A multi-ply, heat-shrinkable film has a surface layer for contact with a cooked or processed meat product which is formed of an ethylene-ethyl acrylate-maleic anhydride copolymer or a mixture of the ethylene-ethyl acrylate-maleic anhydride copolymer and a polyolefin, with the content of ethyl acrylate component in the surface layer being 2 to 20% by weight and the content of maleic anhydride component being 1 to 5% by weight. A cooked or processed meat product may be packaged with the multi-ply, heat-shrinkable film and formed according to zero-loss cooking method.
Oxides of more electropositive elements (particularly metals) tend to be basic, and they are called basic anhydrides. Upon adding water, they may form basic hydroxides. For example, sodium oxide is basic; when hydrated, it forms sodium hydroxide.. Conversely, oxides of more electronegative elements tend to be acidic. They are called acid anhydrides. Upon adding water, they form oxoacids. For example, dichlorine heptoxide is an acidic oxide; perchloric acid is a hydrated form.. In some cases, an oxide can behave as an acid or a base, under different conditions. They are called amphoteric oxides. An example is aluminum oxide. Other oxides do not behave as either acid or base.. The oxide anion (O2−) is the conjugate base of the hydroxide ion (OH−) and is encountered in an ionic solid such as calcium oxide. The O2− anion is unstable in aqueous solution-its affinity for H+ is so great (pKb ~ -22) that it extracts a proton from a solvent H2O molecule:. ...
α-Methylacetylfentanyl (or alphamethylacetylfentanyl) is an opioid analgesic that is an analog of fentanyl. It is a Schedule I controlled substance in the United States, with a DEA ACSCN of 9815. α-Methylacetylfentanyl was sold briefly on the black market in the early 1980s, before the introduction of the Federal Analog Act which for the first time attempted to control entire families of drugs based on their structural similarity rather than scheduling each drug individually as they appeared. α-Methylacetylfentanyl is made with the same synthetic route as α-methylfentanyl, but by substituting the relatively common acetic anhydride for the more difficult to obtain chemical propionic anhydride in the synthesis. α-Methylacetylfentanyl has similar effects to fentanyl.[medical citation needed] Side effects of fentanyl analogs are similar to those of fentanyl itself, which include itching, nausea and potentially serious respiratory depression, which can be life-threatening. Fentanyl analogs have ...
Name: Drug, bio-affecting and body treating compositions > Designated organic active ingredient containing (doai) > Radical -xh acid, or anhydride, acid halide or salt thereof (x is chalcogen) doai > Carboxylic acid, percarboxylic acid, or salt thereof (e.g., peracetic acid, etc.) > Cyclic carboxylic acid containing three to five carbons or cyclic percarboxylic acid containing three to five carbons or salt ...
All information about the latest scientific publications of the Clínica Universidad de Navarra. Bioadhesive properties and biodistribution of cyclodextrin-poly(anhydride) nanoparticles
A general strategy for visible-light-enabled site-selective trifluoromethylative pyridylation of unactivated alkenes has been developed using pyridines and triflic anhydride (Tf2O). Intriguingly, the N-triflylpyridinium salts, generated in situ from pyridines and Tf2O, serve as effective modular bifunctional reagents to install both CF3 and pyridyl groups to various olefins while controlling C4-selectivity in radical addition to the pyridine core. This synthetic route exhibited broad substrate scope under metal-free and mild photocatalytic conditions, granting efficient access to valuable C4-alkylated pyridines and quinolines without requiring prefunctionalization of the reaction site ...
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Pakistan imported Acids; cyclanic, cyclenic or cycloterpenic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and derivatives from China ($346.11K , 200,000 Kg), Germany ($295.14K , 146,981 Kg), Hong Kong, China ($55.86K , 38,740 Kg), Other Asia, nes ($35.39K , 20,790 Kg), United States ($22.66K , 5,013 Kg ...
Anhydrides[edit]. Epoxy resins may be cured with cyclic anhydrides at elevated temperatures. Reaction occurs only after opening ... The low viscosity and high latency of anhydride hardeners makes them suitable for processing systems which require addition of ... Common classes of hardeners for epoxy resins include amines, acids, acid anhydrides, phenols, alcohols and thiols. Relative ... and acid anhydrides), phenols, alcohols and thiols (usually called mercaptans). These co-reactants are often referred to as ...
Alcoholysis of acyl chlorides and acid anhydrides[edit]. Alcohols react with acyl chlorides and acid anhydrides to give esters ... Since acyl chlorides and acid anhydrides also react with water, anhydrous conditions are preferred. The analogous acylations of ...
carboxylic acids to form an organic acid anhydrides. In the above reactions, HX (hydrogen halide or hydrohalic acid) is also ... Allen, C. F. H.; Kibler, C. J.; McLachlin, D. M.; Wilson, C. V. (1946). "Acid Anhydrides". Organic Syntheses. 26: 1. doi: ... On an industrial scale, the reaction of acetic anhydride with hydrogen chloride produces a mixture of acetyl chloride and ... acetic acid: (CH3CO)2O + HCl → CH3COCl + CH3CO2H A key industrial route to propionic anhydride involves thermal dehydration: 2 ...
Equilibrium constants of magnitude KC ≥ 104 are achieved when using reactive reactants (acid chlorides or acid anhydrides) or ... or their anhydrides. The double bond of unsaturated polyesters reacts with a vinyl monomer, usually styrene, resulting in a 3-D ... or trifluoroacetic anhydride. The polycondensation proceeds via the in situ conversion of the carboxylic acid into a more ... metallorganically or enzyme-based A number of catalytic methods for the copolymerization of epoxides with cyclic anhydrides ...
... carboxylic acid anhydrides, ketones (making a precursor for the Jocic-Reeve reaction), and acyl halides. Trichloroacetic acid ... "Trichloromethylation of Anhydrides. Ring-Chain Tautomerism". J. Org. Chem. 30 (8): 2784-2787. doi:10.1021/jo01019a068.. ...
phthalic anhydride. *para-xylene - both methyl groups can be oxidized to form terephthalic acid *dimethyl terephthalate - can ...
Mellitic anhydride (C12O9). *Praseodymium(III,IV) oxide (Pr6O11) ...
Acid anhydrides. *Alkylating agents such as dimethyl sulfate. *Some organic materials such as phenol ("carbolic acid") ...
They are called "acid anhydrides"; adding water, they form oxoacids. For example, dichlorine heptoxide is an acid anhydride; ... They are called basic anhydrides. Exposed to water, they may form basic hydroxides. For example, sodium oxide is basic-when ...
They were the first to prepare Difructose anhydride I. In July 1928, Wesley Stoesser was hired to work in the Organic Lab at ... McDonald, Emma J. (January 1, 1946). "The Polyfructosans and Difructose Anhydrides". In Pigman, W. W.; Wolfrom, M. L. (eds.). ... Jackson, Richard J.; Goergen, Sylvia M. (1929). "A crystalline difructose anhydride from hydrolized inulin". Bureau of ...
Acetic anhydride is mainly produced by the carbonylation of methyl acetate. Acetic anhydride is used industrially for preparing ... In 1955, Scientific Design licensed an improved catalyst for oxidizing benzene to produce maleic anhydride. Maleic anhydride is ... By the 1970s, half of the world's production of maleic anhydride used one of the two processes. In 1959, Scientific Design ... "Maleic anhydride". Huntsman International LLC. Retrieved 6 October 2014. "Propylene Oxidation Looms as Route to Oxide". ...
The dehydration of boronic acids gives boroxines, the trimeric anhydrides of phenylboronic acid. The dehydration reaction is ... ISBN 3-527-30991-8 Washburn, RM; Levens, E; Albright, CF; Billig, FA (1963). "Benzeneboronic anhydride". Organic Syntheses.; ...
Dehydration of succinic acid gives succinic anhydride. Succinate can be used to derive 1,4-butanediol, maleic anhydride, ... Succinate is also produced from butane via maleic anhydride. Global production is estimated at 16,000 to 30,000 tons a year, ... Fieser, Louis F.; Martin, E. L. (1932). "Succinic Anhydride". Organic Syntheses. 12: 66. doi:10.15227/orgsyn.012.0066. "Top ...
Industrially it is produced from phthalic anhydride, beginning with amination: C6H4(CO)2O + NH3 + NaOH → C6H4(C(O)NH2)CO2Na + ... It reacts with phosgene to give isatoic anhydride, a versatile reagent. Chlorination of anthranilic acid gives the 2,4-dichloro ... Wagner, E. C.; Fegley, Marion F. (1947). "Isatoic anhydride". Org. Synth. 27: 45. doi:10.15227/orgsyn.027.0045. Atkinson, ...
In the second step the hydroxyl group is activated as a leaving group by conversion to a triflate by triflic anhydride aided by ... They are prone to forming anhydrides by loss of water molecules, typically to give cyclic trimers. Boronic acids can be ... Phenylboronic acid can be selfcondensed to the cyclic trimer called triphenyl anhydride or triphenylboroxin. Compounds with 5- ... "Benzeneboronic anhydride". Organic Syntheses. 39: 3.; Collective Volume, 4, p. 68 Chan, Dominic M.T. (2003). "Copper promoted C ...
... can be prepared by the reaction of maleic acid anhydride and 1-butanol in presence of p-toluenesulfonic acid. ... 22 (1): 78-80.CS1 maint: multiple names: authors list (link) B. Trivedi (2013). Maleic Anhydride. Springer Science & Business ...
The oxidation of isatin using hydrogen peroxide or chromic anhydride yields isatoic anhydride, a compound widely used either in ... A direct route to -arylisatoic anhydrides". Journal of Heterocyclic Chemistry. 24 (5): 1249-1251. doi:10.1002/jhet.5570240503. ...
There have been a few attempts to synthesize benzotriyne, e.g. by pyrolysis of mellitic anhydride, but without success as of ... Fields, Ellis K.; Meyerson, Seymour (October 1966). "Arynes by Pyrolysis of Acid Anhydrides". J. Org. Chem. 31 (10): 3307-3309 ...
Polyaspirine consists of anhydrides and esters that hydrolytically degrade into the active ingredient in aspirin (salicylic ... Rosenberg, L.E.; Carbone, A.L.; Römling, U.; Uhrich, K.E.; Chikindas, M.L. (May 2008). "Salicylic acid-based poly(anhydride ... 2013). Anhydrides-Advances in Research and Application. ISBN 9781481697163. Goldberg, Daniel R. (Summer 2009). "Aspirin: Turn ... These polymers consist of esters, amides and anhydrides, all of which are susceptible to hydrolysis, thus ensuring the ...
... "β-Methylglutaric anhydride". Organic Syntheses.; Collective Volume, 4, p. 630 Moffett, R. B. (1963). "Methyl γ-Methyl-γ- ...
"Acetic Anhydride and Mixed Fatty Acid Anhydrides". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi: ... Other substitution derivatives include acetic anhydride; this anhydride is produced by loss of water from two molecules of ... Acetic anhydride is also a reagent for the production of heroin and other compounds. Glacial acetic acid is an excellent polar ... The largest single use of acetic acid is in the production of vinyl acetate monomer, closely followed by acetic anhydride and ...
... hexafluorides have properties close to anhydrides. They are very sensitive to moisture and hydrolyze forming AnO2F2. ...
... acid anhydrides (R-CO-O-CO-R); amides (R-C(O)-NR2). There are many important organic solvents that contain oxygen, among which ... acetic anhydride, acetamide, etc. Epoxides are ethers in which the oxygen atom is part of a ring of three atoms. Oxygen reacts ...
... acetic anhydride, and acetamide. Epoxides are ethers in which the oxygen atom is part of a ring of three atoms. The element is ... acid anhydrides (R-CO-O-CO-R); and amides (R-C(O)-NR 2). There are many important organic solvents that contain oxygen, ...
Related to AKDs, is alkenylsuccinic anhydride (ASA). As for AKDs, ASA reacts with hydroxy groups of the cellulose to form an ... ASA is prepared by the ene reaction of unsaturated hydrocarbons with maleic anhydride. As early as 1901, Edgar Wedekind ... In addition to the significantly more reactive alkenylsuccinic anhydrides (which do also hydrolyze rapidly in the presence of ... doi:10.1002/14356007.o18_o11 Gess, Jerome; Rend, Dominic (2005). "Alkenyl Succinic Anhydride (ASA)". TAPPI Journal. 4: 25-30. ...
It is a partner in Diels-Alder reactions, e.g. with maleic anhydride to give tetrahydrophthalic anhydride. Like other dienes, ... "cis-Δ4-Tetrahydrophthalic Anhydride". Org. Synth. 50: 93. doi:10.15227/orgsyn.030.0093.CS1 maint: uses authors parameter (link ...
With cyanuric chloride or trifluoroacetic anhydride instead of oxalyl chloride, the reaction can be warmed to −30 °C without ... Omura, Kanji; Sharma, Ashok K.; Swern, Daniel (1976). "Dimethyl Sulfoxide-Trifluoroacetic Anhydride. New Reagent for Oxidation ... or acetic anhydride (Albright-Goldman oxidation). The intermediate 4 can also be prepared from dimethyl sulfide and N- ...
... anhydride, see phosphorus trioxide. See also[edit]. *Phosphorus, the element. .mw-parser-output table.dmbox{clear: ...
Changed: 'IUPACName' ('Cacodyl oxide' -, 'Dimethylarsinous anhydride', SET 'Cacodyl oxide'). *01:46:57 (5, 5, 5) (EDIT) User: ...
Saito K, Tomita F (2000). "Difructose anhydrides: their mass-production and physiological functions". Biosci. Biotechnol. ... "Characteristics of levan fructotransferase from Arthrobacter ureafaciens K2032 and difructose anhydride IV formation from levan ...
... the anhydride can also react with water to form the original compound. ... anhydride (ănhī´drīd, -drĬd) [Gr.,=without water], chemical compound formed by removing water, H2O, from another compound; ... Anhydrides of organic acids have many uses. They react with alcohols to form esters; e.g., acetic anhydride, (CH3CO)2O, reacts ... the anhydride can also react with water to form the original compound. An acid anhydride reacts with water to form an acid; e.g ...
Maleic anhydride. CAS No: 108-31-6. NOTE:. (1) Efficacy of Medical Tests has not been evaluated.. (2) NIOSH references include ... Maleic anhydride. Editor(s). /Author(s). Specific Medical Test(s) or Examination(s). Reference(s). ...
Phthalic anhydride. CAS No: 85-44-9. NOTE:. (1) Efficacy of Medical Tests has not been evaluated.. (2) NIOSH references include ... Phthalic anhydride. Editor(s). /Author(s). Specific Medical Test(s) or Examination(s). Reference(s). ...
Alkenyl succinic anhydrides (ASA) are modified five-membered succinic anhydrides bearing a branched iso-alkenyl chain (C14 to ... "Process for reacting an olefin with maleic anhydride to obtain an alkenyl succinic anhydride" US 4158664, C.M. Selwitz, H.I. ... and less dark colored alkenyl succinic anhydride (ASA) were needed. The use of alkenylsuccinic anhydrides to hydrophobize ... Therefore, alkenyl succinic anhydrides can be converted into an emulsion only before the use in the paper machine, while AKD ...
... anhydride; Pentafluoropropionic acid anhydride; Perfluoropropionic acid anhydride; Propionic acid, pentafluoro-, anhydride; 2,2 ... Other names: Perfluoropropionic anhydride; Propanoic acid, pentafluoro-, ...
The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database ...
... for example maleic and phthalic anhydrides, are prepared from a vanadium/phosphorus mixed oxide precursor by conditioning it by ... Catalysts for the oxidation of hydrocarbons to acid anhydrides, ... Process of preparing anhydrides from alkanes. US4153577 *. May ... Catalysts for the oxidation of hydrocarbons to acid anhydrides, for example maleic and phthalic anhydrides, are prepared from a ... Catalysts for the oxidation of hydrocarbons to acid anhydrides, for example maleic and phthalic anhydrides, are prepared from a ...
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations ...
See Also: Toxicological Abbreviations Succinic Anhydride (IARC Summary & Evaluation, Volume 15, 1977) ...
Industrially, succinic anhydride is prepared by catalytic hydrogenation of maleic anhydride. Succinic anhydride hydrolyzes ... Succinic anhydride, is an organic compound with the molecular formula (CH2CO)2O. This colorless solid is the acid anhydride of ... In this role, the anhydride is proposed to form an ester with the hydroxyl groups on the cellulose fibers. Maleic anhydride ... RO2CCH2CH2CO2H Maleic anhydride undergoes the Alder-ene reaction with alkenes to give alkenylsuccinic anhydrides. Such ...
... whereby large and uniform crystals of fructose anhydride can be obtained in an enhanced yield. ... The present invention relates to a process for continuously crystallizing fructose anhydride using a seed crystallization tank ... In the crystallization step of the fructose anhydride, an aqueous fructose solution containing at least 90 W/W %, preferably at ... For the crystallization of fructose anhydride in this example, an aqueous fructose solution separated from an aqueous glucose ...
71) 1. Phthalic anhydrides - adverse effects 2. Phthalic anhydrides - standards 3. Phthalic anhydrides - toxicity 4. Accidents ... 2-anhydride; 1,2,4-benzenetricarboxylic anhydride; 4-carboxyphthalic anhydride; 1,3-dioxo-5-phthalancarboxylic acid; 5- ... TRIMELLITIC ANHYDRIDE (1,2,4-benzenetricarboxylic acid 1,2-anhydride; 4-carboxyphthalic anhydride; 1,3-dioxo-5- ... Hydrolysis of the anhydride was not checked during the study. Trimellitic anhydride can thus be considered as readily ...
Anhydrides are also used to make cross-linked, network polymer resins; additional anhydrides commonly used for this application ... Unsaturated anhydrides undergo additional polymerization, usually with styrene, acrylics, and vinyl ethers. ... Anhydrides are very versatile as they can undergo condensation reactions to give polyesters, -imides, -ester-amides, and -ester ... Anhydrides are also used to make cross-linked, network polymer resins; additional anhydrides commonly used for this application ...
"Acid Anhydrides", Understanding Chemistry, retrieved 2006-03-25. . *^ Shakhashiri, Bassam Z., "Acetic Acid & Acetic Anhydride" ... Acetic anhydride, or ethanoic anhydride, is the chemical compound with the formula (CH3CO)2O. Commonly abbreviated Ac2O, it is ... Acetic anhydride, like most acid anhydrides, is a flexible molecule with a nonplanar structure.[3] The pi system linkage ... Like most acid anhydrides, the carbonyl carbon of acetic anhydride has electrophilic character, as the leaving group is ...
acetic anhydride synonyms, acetic anhydride pronunciation, acetic anhydride translation, English dictionary definition of ... acetic anhydride. n a colourless pungent liquid used in the manufacture of cellulose and vinyl acetates for synthetic fabrics. ... ace′tic anhy′dride. n. a colorless, pungent liquid, C4H6O3, the anhydride of acetic acid: used chiefly as a reagent and in the ... Related to acetic anhydride: acetic acid. acetic anhydride. n (Elements & Compounds) a colourless pungent liquid used in the ...
THE ACETIC ANHYDRIDE TEST IN CEREBRO-SPINAL FLUID Br Med J 1929; 2 :953 ... THE ACETIC ANHYDRIDE TEST IN CEREBRO-SPINAL FLUID. Br Med J 1929; 2 doi: https://doi.org/10.1136/bmj.2.3594.953 (Published 23 ...
Looking for SPECTRUM Acetic Anhydride, 500ml (26XH54)? Graingers got your back. Price:$174.24. Easy ordering & convenient ...
acetic benzenesulfonic anhydride, A00072-3.png. (thiobenzoic) anhydride.. Source: PAC, 1995, 67, 1307. (Glossary of class names ...
Sedoheptulose anhydride monohydrate; CAS Number: 469-90-9; EC Number: 207-424-7; Synonym: 2,7-Anhydro-β-D-altro-heptulopyranose ... Sedoheptulose anhydride monohydrate Synonym: 2,7-Anhydro-β-. D. -altro-heptulopyranose, Sedoheptulosan ...
A cyclic dicarboxylic anhydride that is the cyclic anhydride of maleic acid. ChEBI CHEBI:474859, https://www.ebi.ac.uk/chebi/ ...
Testing Status of 4-Nitrophthalic anhydride 5466842. CASRN: 5466-84-2. Formula: C8-H3-N-O5. Synonyms/Common Names. *1,3- ...
Global Tri-Mellitic-Anhydride(TMA)Industry 2016 Market Research Report ​is a new market research publication announced by ... The Tri-Mellitic-Anhydride (TMA) market analysis is provided for the international market including development history, ... To view the table of contents and know more details please visit Global Tri-Mellitic-Anhydride(TMA)Industry 2016 Market ... 8 Major Manufacturers Analysis of Tri-Mellitic-Anhydride (TMA) 8.1 FHR 8.1.1 Company Profile 8.1.2 Product Picture and ...
This study covers the world outlook for phthalic anhydrides across more than 190 countries. For each year reported, estimates ... In order to estimate the latent demand for phthalic anhydrides on a worldwide basis, I used a multi-stage approach. Before ... Based on the aggregate view of phthalic anhydrides as defined above, data were then collected for as many similar countries as ... In particular, we are considering the latent demand for phthalic anhydrides across some 190 countries.. The smallest have fewer ...
Maleic anhydride. ↓Other names: Regulatory process names [2] Trade names [62] IUPAC names [16] ...
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice ...
Succinic anhydride. CAS number:. 108-30-5. No inventory information available. Reference substance information. IUPAC name:. ...
Chinas demand for Maleic-Anhydride has grown at a fast pace in the past decade. In the next decade, both production and demand ... Chinas demand for Maleic-Anhydride has grown at a fast pace in the past decade.. In the next decade, both production and ...
The EC50(48 hours) of hydrolysed ZK 56407 (valeric anhydride) to Daphnia magna is expected to be higher than 100 mg/L. ...
TRIMELLITIC ANHYDRIDE, NEOPENTYL GLYCOL POLYESTER RESIN; ADIPIC ACID, TRIMELLITIC ANHYDRIDE, NEOPENTYL GLYCOL POLYMER; ADIPIC ... TRIMELLITIC ANHYDRIDE COPOLYMER, ADIPIC ACID/NEOPENTYL GLYCOL/TRIMELLITIC ANHYDRIDE COPOLYMER, HEXANEDIOIC ACID, POLYMER WITH 1 ... ADIPIC ACID/ NEOPENTYL GLYCOL/ TRIMELLITIC ANHYDRIDE COPOLYMER. image source: PubChem. Click here for all products containing ... Adipic Acid/Neopentyl Glycol/Trimellitic Anhydride Copolymer is a copolymer of adipic acid, neopentyl glycol and trimellitic ...
  • Adipic Acid/Neopentyl Glycol/Trimellitic Anhydride Copolymer is a copolymer of adipic acid, neopentyl glycol and trimellitic anhydride monomers. (ewg.org)
  • The excess of HLA-DR3 was particularly associated with IgE versus trimellitic anhydride, with HLA-DR3 present in eight of 11 workers with and in two of 14 referents without IgE (Fisher's statistic = 8.5, odds ratio = 16, p = 0.004). (nih.gov)
  • Trimellitic anhydride is mainly applied to produce good heat-proof, weather-proof and solvent-proof trimellitate plasticizers, among which the most popular product is tri(2-ethylhexyl)trimellitate. (lookchem.com)
  • Trimellitic Anhydride is mainly used as raw material for polyester resin,polyimide resin,plasticizer TOTM ,and also be used for producing heatproof & insulating,adhesive,surfactant, paint,synthesize dye materials etc. (lookchem.com)
  • Trimellitic anhydride is used as an embossing agent for vinyl flooring and as a curing agent for epoxy resins. (lookchem.com)
  • ▲1. Bernstein, D.I., Patterson, R. et Zeiss, C.R., «Clinical and immunologic evaluation of trimellitic anhydride and phthalic anhydride exposed workers using a questionnaire with comparative analysis of enzyme-linked immunosorbent and radioimmunoassay studies. (csst.qc.ca)
  • The relationship of total serum IgE and blocking antibody in trimellitic anhydride-induced occupational asthma. (csst.qc.ca)
  • Syndromes in workers exposed to trimellitic anhydride. (csst.qc.ca)
  • A clinical and immunologic study of employees in a facility manufacturing trimellitic anhydride. (csst.qc.ca)
  • Alkenyl succinic anhydrides (ASA) are modified five-membered succinic anhydrides bearing a branched iso-alkenyl chain (C14 to C22). (wikipedia.org)
  • The excess alkene is removed by distillation in vacuo, the resulting alkenyl succinic anhydride hydrolyzed with dilute sodium hydroxide solution and the disodium salt reacted with an acid to achieve an alkenebutanedioic acid. (wikipedia.org)
  • 30% higher reaction yields were achieved with a pre-cleaned cracked petroleum distillate in an autoclave at 210 °C and it was found that the hydrolysis of the succinic anhydride can already be carried out with steam. (wikipedia.org)
  • However, for later use in cleaners and detergents, clear (meaning polymer-free) and less dark colored alkenyl succinic anhydride (ASA) were needed. (wikipedia.org)
  • The use of alkenylsuccinic anhydrides to hydrophobize cellulose-based (cotton) textiles (first patented in 1959) and the transfer of this concept to the hydrophobization of paper using iso-octadecenyl succinic anhydrides (C18-ASA) in 1963 required liquid, particle-free colours with a colour as light as possible. (wikipedia.org)
  • After initial difficulties in using ASA for paper sizing (particularly the rapid hydrolysis to alkenyl succinic acids and the formation of poorly soluble calcium salts in hard water and deposits in the paper machine), process parameters could be adjusted to make alkenyl succinic anhydrides the most important sizing agents in the US. (wikipedia.org)
  • Succinic anhydride, is an organic compound with the molecular formula (CH2CO)2O. (wikipedia.org)
  • This colorless solid is the acid anhydride of succinic acid. (wikipedia.org)
  • Industrially, succinic anhydride is prepared by catalytic hydrogenation of maleic anhydride. (wikipedia.org)
  • Succinic anhydride hydrolyzes readily to give succinic acid: (CH2CO)2O + H2O → (CH2CO2H)2 With alcohols (ROH), a similar reaction occurs, delivering the monoester: (CH2CO)2O + ROH → RO2CCH2CH2CO2H Maleic anhydride undergoes the Alder-ene reaction with alkenes to give alkenylsuccinic anhydrides. (wikipedia.org)
  • This experiment involved a reaction between anthracene and maleic anhydride via a Diels Alder reaction to yield 9, 10-dihydroanthracene-9,10-α, β-succinic anhydride. (bartleby.com)
  • Furthermore, rapid use of bio-based succinic acid as a substitute to maleic anhydride may also pose a major threat to the growth of global maleic anhydride market. (mynewsdesk.com)
  • A novel adsorbent based on peanut shells modified with glutaraldehyde and succinic anhydride was prepared. (scirp.org)
  • Li, L. , Sun, X. and Li, B. (2012) Adsorption of cytochrome c by succinic anhydride-modified peanut shells. (scirp.org)
  • Chemical Database: Amines, Polyethylenepoly-, Reaction Products With Succinic Anhydride Polybutenyl Derivs. (environmentalchemistry.com)
  • The purpose of this experiment is to form 9,10-dihydroanthracene-9,10-α,β-succinic anhydride by way of a Diels Alder reaction between anthracene and maleic anhydride, as shown in the reaction below. (vernier.com)
  • It refers to an acidic anhydride of maleic acid which is generally colorless as compared to white organic compounds and is a versatile chemical intermediate which is widely used to furnish important chemicals such as tetrahydrofuran, 1,4-butanediol and gamma-butyrolactone among others. (mynewsdesk.com)
  • A group of enzymes that catalyze the hydrolysis of diphosphate bonds in compounds such as nucleoside di- and tri-phosphates, and sulfonyl-containing anhydrides such as adenylylsulfate. (curehunter.com)
  • Maleic anhydride was traditionally manufactured by the oxidation of benzene or other aromatic compounds. (steunmijnclub.nl)
  • Catalysts for the oxidation of hydrocarbons to acid anhydrides, for example maleic and phthalic anhydrides, are prepared from a vanadium/phosphorus mixed oxide precursor by conditioning it by contact with a strong acid of concentration at least 3N and solvent extraction to remove unwanted phases. (google.com)
  • Phthalic anhydrides - adverse effects 2. (inchem.org)
  • Phthalic anhydrides - standards 3. (inchem.org)
  • Phthalic anhydrides - toxicity 4. (inchem.org)
  • This study covers the world outlook for phthalic anhydrides across more than 190 countries. (reportlinker.com)
  • This study gives, however, my estimates for the worldwide latent demand, or the P.I.E., for phthalic anhydrides. (reportlinker.com)
  • In order to estimate the latent demand for phthalic anhydrides on a worldwide basis, I used a multi-stage approach. (reportlinker.com)
  • For example, flammable liquids (acetone and the alcohols such as ethanol, methanol, isobutanol and t-butanol) are given high hazard ratings while glacial acetic acid, acetic anhydride and adipoyl chloride whose hazard lies in the inhalation of the vapour are given medium ratings. (thefreedictionary.com)
  • Acetone is pyrolyzed with a catalyst in an electrically heated glass tube and the product is dissolved in glacial acetic acid to produce acetic anhydride. (sciencemadness.org)
  • Propionic anhydride was previously used in the preparation of α- and β-1-propionyl derivatives of glucopyranose tetra-acetate. (lookchem.com)
  • Propionic anhydride reacts exothermically with water. (lookchem.com)
  • Propionic anhydride can be synthesized by dehydration of propanoic acid using ketene. (lookchem.com)
  • This work describes the preparation, characterization and evaluation of the nanoparticles formed by the copolymer of methyl vinyl ether and maleic anhydride (Gantrez) AN) and cyclodextrins, including beta-cyclodextrin (CD) hydroxypropyl-beta-cyclodextrin (HPCD) and 6-monodeoxy-6-monoamino-beta-cyclodextrin (NHCD). (cun.es)
  • A new amphiphilic comb-shaped copolymer (SP) was synthesized by conjugating poly(styrene-co-maleic anhydride) with low molecular weight polyethyleneimine for gene delivery. (dovepress.com)
  • Facile immobilization of horseradish peroxidase ( HRP ) and glucose oxidase ( GOX ) was achieved on electrospun nanofibres made of an alternating copolymer of styrene ( Sty ) and maleic anhydride ( MAh ). (rsc.org)
  • Based on the method of RAFT mini-emulsion polymerization, the styrene/butyl acrylate block copolymer (SMA-SBAS) was successfully synthesized, mediated by maleic anhydride/styrene alternating copolymer (SMA) as the amphiphilic macroRAFT agent5-7. (aiche.org)
  • Other important acid anhydrides include maleic anhydride and phthalic anhydride. (encyclopedia.com)
  • Key market players in the global maleic anhydride market include maleic anhydride Polynt S.p.A, Nippon Shokubai Co., Ltd., Zhejiang Jiangshan Chemical Co., Ltd., Huntsman International LLC, Changzhou Yabang Chemical Co., Ltd., and Flint Hills Resources. (sbwire.com)
  • Anthracene was the diene and maleic anhydride was the dienophile. (bartleby.com)
  • Anthracene acts as the diene and maleic anhydride functions as the dienophile. (vernier.com)
  • 1,2,4-Benzenetricarboxylic anhydride reacts exothermically with water. (lookchem.com)
  • PLA-terminated sebacic acid polymers were synthesized by melt condensation of the acetate anhydride derivatives of PLA oligomers and sebacic anhydride oligomers to yield ABA triblock copolymers of molecular weights between 3000 and 9000 that melt at temperatures between 35 and 80 degrees C. Pairs of the corresponding enantiomeric ABA copolymers composed of l-PLA-PSA-l-PLA and d-PLA-PSA-d-PLA were solvent mixed to form stereocomplexes. (biomedsearch.com)
  • Long-​chain derivatives of citraconic anhydride: new metabolites of Aspergillus wentii Wehmer. (aspergillus.org.uk)
  • Abstract Isopropylthioxanthone is a popular cosynergist for Type II and three-component photoinitiators used to photopolymerize ultraviolet (UV) curable coatings and can be used in the presence of maleic anhydride derivatives to efficiently cure coatings used in numerous applications. (thefreelibrary.com)
  • When considering the excited triplet state energies of both ITX and maleic anhydride derivatives (64 and 72 kcal/mol, respectively), photosensitization is highly unlikely since an energy transfer fronot m a lower energy to a higher energy is not thermodynamically favored (2). (thefreelibrary.com)
  • Acid anhydrides are the second most reactive of the carboxylic acid derivatives and can therefore, be fairly readily converted into the other less reactive carboxylic acid derivatives (see above). (ucalgary.ca)
  • The infrared and nmr spectral properties of the acid and its anhydride are discussed. (dtic.mil)
  • Research and Markets ( http://www.researchandmarkets.com/research/2b22nm/acetic_acid ) has announced the addition of the 'Acetic Acid Market For VAM, PTA, Acetate Esters, Acetic Anhydride And Other Applications - Forecast to 2018' report to their offering. (prnewswire.co.uk)
  • The Tennessee Eastman acetic anhydride process involves the conversion of methyl acetate to methyl iodide and an acetate salt. (wikipedia.org)
  • Workers from 2 condenser plants using epoxy resin with methyl tetrahydrophthalic anhydride (MTHPA) underwent a questionnaire survey and serology investigations. (ilo.org)
  • 3. A no-flow underfill material as claimed in claim 1 , wherein said organic carboxylic acid anhydride hardener is selected from the group consisting of hexahydrophthalic anydride, methyl hexahydrophthalic anhydride, and mixtures thereof. (google.com.au)
  • One of these systems includes isopropylthioxanthone (ITX), 2,3-dimethyl maleic anhydride (DMMA), and N-methyl-N,N-diethanolamine (MDEA) (4). (thefreelibrary.com)
  • Catalysts for the oxidation of hydrocarbons to maleic anhydride have been made by reacting a vanadium compound with phosphoric acid in an acid solution, evaporating to dryness to give a vanadium/phosphorus mixed oxide catalyst precursor and activating the catalyst by heat treatment. (google.com)
  • Direct benzoylation of the two hydroxyl groups on chitosan was achieved using a phosphoryl mixed anhydride system, derived from trifluoroacetic anhydride (TFAA), benzoic acids (BAs), and phosphoric acid (PA). (mdpi.com)
  • In processes in which the product gas after recovery of maleic anhydride is vented or burned it is important, therefore, that the pass yield should be high, i.e. that the proportion of the hydrocarbon converted to maleic anhydride on a single pass should be as high as possible. (google.com)
  • 5-Hydroxymethylfurfural (HMF) was converted to maleic anhydride in 52% yield via selective oxidation with molecular oxygen using VO(acac)2 as catalyst in liquid phase. (steunmijnclub.nl)
  • Over 25 years of reporting on key chemicals markets, including Maleic anhydride, has brought global recognition of our methodology as being unbiased, authoritative and rigorous in preserving our editorial integrity. (icis.com)
  • It turns out that there's another synthesis route to acetic anhydride that requires more equipment but uses more accessible chemicals. (sciencemadness.org)
  • The reaction of maleic anhydride (MAN) with aliphatic monounsaturated n- and iso-alkenes was described as early as 1936 in a patent. (wikipedia.org)
  • The patent describes the reaction of the alkenes with excess maleic anhydride at 200 °C in an autoclave. (wikipedia.org)
  • Thereby, a quantitative reaction of the maleic anhydride can be achieved. (wikipedia.org)
  • Maleic anhydride undergoes a similar reaction with polyisobutylene to give polyisobutylenylsuccinic anhydride, a common building block chemical in the petroleum additives industry. (wikipedia.org)
  • To a decreasing extent, acetic anhydride is also prepared by the reaction of ketene ( ethenone ) with acetic acid at 45-55 °C and low pressure (0.05-0.2 bar). (wikipedia.org)
  • Cyclodehydration was accomplished by adding acetic anhydride and fused sodium acetate (22.1 ml and 0.02 g, respectively, per mol of water condensed to the reaction solution and heating at 90 [degrees] C for 0.5h). (thefreedictionary.com)
  • What is the reaction between acetic anhydride and water? (reference.com)
  • Acetic anhydride is highly reactive to water, and this reaction becomes especially dangerous when mineral acids, such as nitric or sulphuric acid, are present. (reference.com)
  • In initial experiments the extent of reaction between tryptophan and acetic anhydride was examined and product amounts quantitated by CE. (biomedsearch.com)
  • For example, the reaction of acetic anhydride with ethanol yields ethyl acetate: (CH 3 CO) 2 O + CH 3 CH 2 OH → CH 3 CO 2 CH 2 CH 3 + CH 3 COOH. (hmdb.ca)
  • e.g., acetic anhydride, (CH 3 CO) 2 O, reacts with ethanol, C 2 H 5 OH, to form ethyl acetate, CH 3 COOC 2 H 5 , a useful solvent. (encyclopedia.com)
  • Acetic anhydride was first synthesized in 1852 by the French chemist Charles Frédéric Gerhardt (1816-1856) by heating potassium acetate with benzoyl chloride . (wikipedia.org)
  • Celanese has informed employee delegates in Roussillon, France, and work council in Tarragona, Spain, of contemplated closures of the Roussillon acetic anhydride facility and the vinyl acetate monomer (VAM) production unit in Tarragona. (hydrocarbonprocessing.com)
  • Maleic anhydride acts as a vital component of food preservatives, gelling agents and flavor enhancers by converting the maleic anhydride into fumaric acid and maleic acid. (mynewsdesk.com)
  • In industry, maleic acid is derived by hydrolysis of maleic anhydride, the latter being produced by oxidation of benzene or butane. (steunmijnclub.nl)
  • It is the acid anhydride of maleic acid and in its pure state is a colorless or white solid with an acrid odor. (steunmijnclub.nl)
  • Maleic anhydride (butenedioic anhydride, toxilic anhydride, 2,5- dioxofuran ) is an organic compound with the formula C 2 H 2 (CO) 2 O. It is the acid anhydride of maleic acid and in its pure state it is a colourless or white solid with an acrid odour. (steunmijnclub.nl)
  • Anhydrides are very versatile as they can undergo condensation reactions to give polyesters, -imides, -ester-amides, and -ester-imides. (sigmaaldrich.com)
  • Acetic anhydride also produces violent reactions when mixed with boric acid, ethanol and methanol. (reference.com)
  • The anhydrides reactions are also discussed. (dtic.mil)
  • Pivalic anhydride (CAS 1538-75-6) Market Research Report 2018 contents were prepared and placed on the website in March, 2018. (marketpublishers.com)
  • Please note that Pivalic anhydride (CAS 1538-75-6) Market Research Report 2018 is a half ready publication and contents are subject to change. (marketpublishers.com)
  • Acetic anhydride is a versatile reagent for acetylations , the introduction of acetyl groups to organic substrates. (wikipedia.org)
  • Acetic anhydride, also called acetyl ether or ethanoic anhydride, is a compound with the chemical formula C4H6O3 and a molecular weight value of 102.08. (reference.com)
  • of modified food starch and for acetylation of monoglycerides Acetic anhydride is a versatile reagent for acetylations, the introduction of acetyl groups to organic substrates. (hmdb.ca)
  • Acetic anhydride , or ethanoic anhydride , is the chemical compound with the formula (CH 3 CO) 2 O. Commonly abbreviated Ac 2 O, it is the simplest isolable anhydride of a carboxylic acid and is widely used as a reagent in organic synthesis . (wikipedia.org)
  • Heating in vacuum shifts the equilibrium as about 80% of the carboxylic acid groups transform to the anhydrides. (rsc.org)
  • An epoxy material suitable for no-flow underfilling processes with high glass transition temperature can be obtained by curing a solvent free formulation containing an epoxy resin, an organic carboxylic acid anhydride hardener, a curing accelerator, a fluxing agent, a viscosity controlling agent, a coupling. (google.com.au)
  • China's demand for Tetrahydrophthalic Anhydride (THPA) has grown at a fast pace in the past decade. (marketpublishers.com)
  • Styrene Maleic Anhydride is a tricky polymer that I've been researching over the last few days. (physicsforums.com)
  • Styrene and maleic anhydride can be copolymerized in a number of ways that greatly change the resulting polymer. (physicsforums.com)
  • Try visualizing the styrene polymer, first and then see how one maleic anhydride can disrupt that regular polymer coil. (physicsforums.com)
  • In the United States alkenylsuccinic anhydrides are the preferred paper sizing agents, whereas in Europe, alkyl ketene dimers (AKDs) predominate. (wikipedia.org)
  • Unbranched 1-alkenylsuccinic anhydrides, which can be obtained from 1-alkenes, are solid at room temperature and not suited for engine sizing from aqueous emulsion. (wikipedia.org)
  • Anhydrides of organic acids have many uses. (encyclopedia.com)
  • Ocular and airway symptoms related to organic acid anhydride exposure--a prospective study. (nih.gov)
  • Organic acid anhydrides (OAA) are used as hardeners in epoxy resin systems. (nih.gov)
  • Maleic anhydride is the organic compound which is the maleic acid's acid anhydride. (sbwire.com)
  • it is an colorless acid anhydride that is widely used as a reagent in organic synthesis. (lookchem.com)
  • Acetic anhydride is the chemical compound with the formula (CH 3 CO) 2 O. Commonly abbreviated Ac 2 O, it is one of the simplest acid anhydrides and is a widely used reagent in organic synthesis. (hmdb.ca)
  • TCC's Maleic Anhydride is an organic compound with the formula C2H2(CO)2O. (steunmijnclub.nl)
  • Maleic anhydride is primarily manufactured using feed stocks including benzene and n-butane of which the production of maleic anhydride from n-butane accounts for a significant share as compared to benzene. (mynewsdesk.com)
  • On the basis of raw material, the global maleic anhydride market can be segmented into N-butane and benzene. (mynewsdesk.com)
  • Maleic anhydride is extracted from feedstock such as benzene and n-butane. (sbwire.com)
  • I know the bond angles inside the benzene are 120 degrees, and the Carbon attached to the benzene ring attaches at a 120 degree angle, but what of the anhydride ring, or the other carbons? (physicsforums.com)
  • Dehydration of the acid with P4O10 proceeds smoothly to give good yields of the anhydride, ((CF3)2P(S))2O, which is extremely inert toward electrophilic reagents such as hydrogen halides and hydrogen sulfide. (dtic.mil)
  • Acetic Anhydrides" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (umassmed.edu)
  • This graph shows the total number of publications written about "Acetic Anhydrides" by people in this website by year, and whether "Acetic Anhydrides" was a major or minor topic of these publications. (umassmed.edu)
  • Below are the most recent publications written about "Acetic Anhydrides" by people in Profiles. (umassmed.edu)
  • Citraconylation by citraconic anhydride provides an easy method for the reversible blocking of protein amino groups. (ihcworld.com)
  • Pre-heat steamer or water bath with staining dish containing Citraconic Anhydride Buffer until temperature reaches 95-100 ° C. (ihcworld.com)
  • Since citraconic anhydride is considered a toxic agent, it is necessary to use a hood and to prevent contact with skin and eyes when performing the AR procedure, although the concentration needed was very low. (ihcworld.com)
  • 1. Namimatsu S, Ghazizadeh M and Sugisaki Y (2005) Reversing the effects of formalin fixation with citraconic anhydride and heat: a universal antigen retrieval method. (ihcworld.com)
  • We provide independent and unbiased information on manufacturers, prices, production news and consumers for the global and regional (North America, Asia and Europe) market of Citraconic anhydride. (reportsnreports.com)
  • Trifluoroacetic Anhydride Market report contains all study material about overview, growth, demand and forecast research report in all over the world. (beforeitsnews.com)
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  • Diglycidyl ether of bisphenol A (DGEBA) and epoxidized soybean oil (ESO) were crosslinked using methyltetrahydrophthalic anhydride (MTHPA) as a curing agent and 1-methylimidazole (1MI) as an initiator. (hindawi.com)
  • Global Tri-Mellitic-Anhydride(TMA)Industry 2016 Market Research Report ​is a new market research publication announced by Reportstack. (pitchengine.com)
  • This invention relates to the production of acid anhydrides especially maleic anhydride and catalysts therefor. (google.com)
  • It is an object of this invention to provide catalysts for the oxidation of hydrocarbons to maleic anhydride which possess an acceptable selectivity as judged in the case of a "fuel lean" system by the pass yields obtainable with them under suitable conditions and in the case of a "fuel rich" system by the selectivities based on the hydrocarbon consumed at an acceptable conversion under suitable conditions. (google.com)
  • Finally, on-column derivatization of alkylamines with phthalic anhydride was investigated and electrophoretic mobility related to molecular weight of the derivatized amines. (biomedsearch.com)
  • Some of these systems use maleic anhydride (MA) derivations or maleimides (made from maleic anhydrides), tertiary amines, and an UV absorbent cosynergist (3). (thefreelibrary.com)
  • In these conversions, acetic anhydride is viewed as a source of CH 3 CO + . Alcohols and amines are readily acetylated. (hmdb.ca)
  • 1. A process of oxidizing butane, a butene or a mixture of butane and a butene to maleic anhydride by contacting it in the vapor phase and in the presence of oxygen with a catalyst which consists essentially of a vanadium/phosphorous mixed oxide having a surface area greater than 10 m 2 /g and lanthanum as a promoter. (google.com)
  • In addition, rising use of maleic anhydride along with bio-based feed stock polymers is expected to accelerate the growth of global maleic anhydride market over forecast period. (mynewsdesk.com)
  • This report studies the global Acetic Anhydride market status and forecast, categorizes the global Acetic Anhydride market size (value & volume) by key players, type, application, and region. (sbwire.com)
  • As a result, an excess of anhydride improves the final thermal properties of the ESO/MTHPA/1MI network, contrary to the behavior observed for DGEBA/MTHPA/1MI. (hindawi.com)
  • It is important that the catalyst should have a high selectivity, that is that the yield of maleic anhydride should be as high as possible based on the hydrocarbon consumed in the process. (google.com)
  • If any unconverted hydrocarbon is recycled it is desirable that a high pass yield should be achieved in order to avoid recycling an unduly high proportion of the hydrocarbon but the selectivity in terms of the yield of maleic anhydride based on the hydrocarbon consumed in each pass is relatively more important. (google.com)
  • The present invention can realize the crystallization at a low temperature of 40 to 50 C. or below and prevents the decomposition and the polymerization of fructose which often occur above 50 C. by mixing an aqueous fructose solution and a great deal of crystals at a high speed, whereby large and uniform crystals of fructose anhydride can be obtained in an enhanced yield. (google.com)
  • In separate experiments a series of amino acids and peptides were injected into the capillary and reacted with phthalic anhydride on-column to yield the phthalic derivatized species. (biomedsearch.com)
  • Increasing popularity of using the maleic anhydride with the feedstock polymers that are bio-based is positively impacting the market. (sbwire.com)
  • For instance, the anhydride calcium oxide forms calcium hydroxide. (reference.com)
  • Maleic anhydride (MA) is derived from butane in the US. (icis.com)
  • Specialists attempt to assess the true volume of opium production of the region from the recorded seizures of acetic anhydride , the chemical used in heroin manufacture. (thefreedictionary.com)
  • ICIS provides pricing information, news and analysis for all major petrochemical and chemical markets, including Maleic anhydride. (icis.com)
  • ICIS collects pricing data on a wide range of chemical, energy and fertilizer products, including Maleic anhydride. (icis.com)
  • These new insights into graphene chemistry enable us to develop a simple, straight-forward chemical functionalisation protocol for graphene making use of the anhydrides. (rsc.org)
  • Chemical Properties: Maleic anhydride is colorless needles, white lumps, or pellets. (steunmijnclub.nl)