Anhydrides: Chemical compounds derived from acids by the elimination of a molecule of water.Acetic Anhydrides: Compounds used extensively as acetylation, oxidation and dehydrating agents and in the modification of proteins and enzymes.Phthalic Anhydrides: 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.Maleic Anhydrides: 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.Succinic Anhydrides: 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.Citraconic Anhydrides: Methylmaleic anhydrides.Epoxy Resins: Polymeric resins derived from OXIRANES and characterized by strength and thermosetting properties. Epoxy resins are often used as dental materials.Fluoroacetates: 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)Aconitic AcidMaleatesDiethyl Pyrocarbonate: Preservative for wines, soft drinks, and fruit juices and a gentle esterifying agent.Disaccharides: Oligosaccharides containing two monosaccharide units linked by a glycosidic bond.Trifluoroacetic Acid: 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.Phthalic Acids: 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)Pyran Copolymer: 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.Chemistry: A basic science concerned with the composition, structure, and properties of matter; and the reactions that occur between substances and the associated energy exchange.Coenzyme A-Transferases: 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.Chemical Phenomena: The composition, conformation, and properties of atoms and molecules, and their reaction and interaction processes.Gas Chromatography-Mass Spectrometry: A microanalytical technique combining mass spectrometry and gas chromatography for the qualitative as well as quantitative determinations of compounds.Furans: Compounds with a 5-membered ring of four carbons and an oxygen. They are aromatic heterocycles. The reduced form is tetrahydrofuran.Rutamycin: 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.NorbornanesRuminococcus: A genus of gram-positive bacteria in the family Lachnospiraceae that inhabits the RUMEN; LARGE INTESTINE; and CECUM of MAMMALS.Acylation: The addition of an organic acid radical into a molecule.Benzene DerivativesMolecular Structure: 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.Succinates: 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.MercaptoethylaminesIndicators and Reagents: 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)Formates: 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.

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)

*Diethyl phthalate

Phthalic anhydride is produced by either the oxo process or the Ald-Ox process from ethanol and the oxidation of naphthalene or ... Diethyl phthalate is produced by the reaction of phthalic anhydride with ethanol in the presence of a catalytic amount of ... and maleic anhydride. Diethyl phthalate is hydrolyzed to monoester, monoethyl phthalate and ethanol after oral administration ...

*Terephthalic acid

Henkel technology (not in practice): Starting with phthalic anhydride, monopotassium and dipotassium phthalate salts were ...

*Α-Methylacetylfentanyl

... but by substituting the relatively common acetic anhydride for the more difficult to obtain chemical propionic anhydride in the ...

*Alkenylsuccinic anhydrides

Alkenyl succinic anhydrides (ASA) are modified five-membered succinic anhydrides bearing a branched iso-alkenyl chain (C14 to ... "Alkenyl succinic anhydrides process" US 8350058, D. Leinweber, T. Rau, "Method for producing alkenyl succinic anhydrides" US ... "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 ...

*Methanesulfonic anhydride

... is the acid anhydride of methanesulfonic acid. Like methanesulfonyl chloride, it may be used to ... 4 H3PO4 Disulfuric acid Sodium pyrosulfate Acetic anhydride Trifluoromethanesulfonic anhydride Wachtmeister, C. A.; Pring, B.; ... Field, Lamar; Settlage, Paul H. (March 1954). "Alkanesulfonic Acid Anhydrides". Journal of the American Chemical Society. 76 (5 ...

*Butyric anhydride

... (butanoic anhydride) is a chemical compound with the formula (CH3CH2CH2CO)2O. It is a clear colorless liquid ... Because of its odor, butyric anhydride has use as a fumigant to drive bees from their hives. Butyric anhydride is a combustible ...

*Propionic anhydride

This simple acid anhydride is a colourless liquid. It is a widely used reagent in organic synthesis. Propanoic anhydride has ... Due to its potential use as a precursor in the synthesis of fentanyl and fentanyl analogs, propanoic anhydride is regulated by ... Williams, J. W. Krynitsky, J. A. (1955). "n-Caproic Anhydride". Organic Syntheses. CS1 maint: Multiple names: authors list ( ... Propanoic anhydride is an organic compound with the formula (CH3CH2CO)2O. ...

*Isatoic anhydride

... is used as a blowing agent in the polymer industry, an application that exploits its tendency to release CO2 ... Isatoic anhydride is an organic compound derived from anthranilic acid. A white solid, it is prepared by reaction of ... 1947). "Isatoic anhydride". Org. Synth. 27: 45. doi:10.15227/orgsyn.027.0045. CS1 maint: Uses authors parameter (link) Coppola ... Gary M. (1980). "The Chemistry of Isatoic Anhydride". Synthesis. 7: 505-36. doi:10.1055/s-1980-29110. ...

*Inorganic anhydride

chromium trioxide is the anhydride of chromic acid: H2CrO4 -> H2O + CrO3 iron(II) oxide is the anhydride of the aqueous ferrous ... It shares this definition with acid anhydrides but inorganic anhydrides do not contain any organic moiety. For example, carbon ... Other inorganic acids have anhydrides which are oxides. Examples include: silicon dioxide is the anhydride of silicic acid: Si( ... vanadium pentoxide is the anhydride of vanadic acid: 2H3VO4 -> 3H2O + V2O5. sulfur trioxide is the anhydride of sulfuric acid: ...

*Phthalic anhydride

The phthalic anhydride is separated from byproducts by a series of "switch condensers". Phthalic anhydride and maleic anhydride ... It is the anhydride of phthalic acid. Phthalic anhydride is a principal commercial form of phthalic acid. It was the first ... Phthalic anhydride can also be prepared from phthalic acid: The primary use of phthalic anhydride is a precursor to phthalate ... Phthalic anhydride is a degradation product of CAP. Phthalic anhydride is a versatile intermediate in organic chemistry, in ...

*Malonic anhydride

It can be viewed as the anhydride of malonic acid, or a double ketone of oxetane. Malonic anhydride was first synthesized in ... Carbon suboxide (C3O2), an anhydride of malonic anhydride. 2-oxetanone, also called β-propiolactone 3-oxetanone. ... Malonic anhydride or oxetane-2,4-dione is an organic compound with chemical formula C3H2O3 or CH2(CO)2O. ... Charles L. Perrin, Douglas Magde, Sylvia J. Berens, Julie Roque (1980), Raman spectrum of a malonic anhydride. (Actually, of 3, ...

*Benzoic anhydride

... is the acid anhydride of benzoic acid. It is the simplest symmetrical aromatic acid anhydride. It can be ...

*Trifluoroacetic anhydride

... (TFAA) is the acid anhydride of trifluoroacetic acid. It is the perfluorinated derivative of acetic ... Trifluoroacetic anhydride is the recommended desiccant for trifluoroacetic acid. Trifluoroacetic anhydride may be prepared from ... Like many acid anhydrides, it may be used to introduce the corresponding trifluoroacetyl group. The corresponding acyl chloride ...

*Formic anhydride

... , also called methanoic anhydride, is an organic compound with the chemical formula C 2H 2O 3 and a structural ... It can be viewed as the anhydride of formic acid (HCOOH). Formic anhydride can be obtained by reaction of formyl fluoride with ... The decomposition of formic anhydride may be catalyzed by formic acid. Formic anhydride can be detected in the gas-phase ... Acetic formic anhydride Acetic anhydride Formaldehyde Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred ...

*Base anhydride

If water is added to a base anhydride, a corresponding hydroxide salt can be re-formed. Base anhydrides are not Brønsted-Lowry ... A base anhydride is an oxide of a chemical element from group 1 or 2 (the alkali metals and alkaline earth metals, respectively ...

*Succinic anhydride

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 ... Maleic anhydride undergoes the Alder-ene reaction with olefins to give alkenylsuccinic anhydrides. Such compounds are sizing ...

*Trimellitic anhydride

... is an organic compound with the formula C9H4O5. The CAS number is 552-30-7. It may be purchased ...

*Trifluoromethanesulfonic anhydride

Abbreviated Tf2O, triflic anhydride is the acid anhydride of the strong acid triflic acid, CF3SO2OH. It can be assayed by 19F ... Triflic anhydride is the chemical compound with the formula (CF3SO2)2O. This compound is a particularly strong electrophile, ... Methanesulfonic anhydride Bloodworth, A.J.; Curtis, Richard J.; Spencer, Michael D.; Tallant, Neil A. (March 1993). " ... "Chemical Transformations Induced by Triflic Anhydride". Tetrahedron. 56 (20): 3077-3119. doi:10.1016/S0040-4020(00)00093-4. ...

*Mellitic anhydride

... , the anhydride of mellitic acid, is an organic compound with the formula C12O9. Mellitic anhydride is an ...

*Acid anhydride

An acid anhydride is formed when two acid structures combine with loss of a water molecule. Depending on the types of acids in ... the parent compounds, the result can be: Acidic oxide Inorganic anhydride Organic acid anhydride. ...

*Oxalic anhydride

... or ethanedioic anhydride, also called oxiranedione, is a hypothetical organic compound with the formula C2O3, ... which can be viewed as the anhydride of oxalic acid or the two-fold ketone of ethylene oxide. It is an oxide of carbon (an ... acid anhydride". J. Chem. Soc., Perkin Trans. 1 (16): 2553-2558. doi:10.1039/a803430c. Ahmed A. El-Sherif, Bakir J. A. Jeragh ( ... which can be viewed as the cyclic dimer of oxalic anhydride. It has been conjectured to be a fleeting intermediate in the ...

*Acetic formic anhydride

Formic anhydride Acetic anhydride Acetic oxalic anhydride "Formyl acetate - PubChem Public Chemical Database". The PubChem ... It can be viewed as the mixed anhydride of acetic acid and formic acid. Acetic formic anhydride can be produced by reacting ... Acetic formic anhydride is an organic compound with the chemical formula C 3H 4O 3 and a structural formula of H 3C-(C=O)-O-(C= ... An example of Acetic formic anhydride being used was in the synthesis of Quazodine (U.S. Patent 3,248,292). ...

*Trimellitic anhydride chloride

... is a chemical compound used to produce polyamide-imide plastic. Mellitic acid Mellitic anhydride ...

*Organic acid anhydride

An organic acid anhydride is an acid anhydride that is an organic compound. An acid anhydride is a compound that has two acyl ... Maleic anhydride is a cyclic anhydride, widely used to make industrial coatings. ATP in its protonated form is an anhydride ... Thus, (CH3CO)2O is called acetic anhydride. Mixed (or unsymmetrical) acid anhydrides, such as acetic formic anhydride (see ... The mixed anhydride 1,3-bisphosphoglycerate is an intermediate in the formation of ATP via glycolysis, is the mixed anhydride ...

*3-Chlorophthalic anhydride

... is a monochlorinated aromatic anhydride. It is an isomer of 4-chlorophthalic anhydride and a ... 3-Chlorophthalic anhydride has a melting point of around 123 °C. It may hydrolize in presence of water. 3-Chlorophthalic ... 4-Chlorophthalic anhydride Preparation of 3-chlorophthalic anhydride http://www.freepatentsonline.com/5683553.html. ... anhydride may be used to produce herbicides and pesticides, intermediates for active pharmaceutical ingredients and can be used ...
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.
Considered overall, the most important anhydride used for curing bisphenol. A resin is phtalic anhydride, but in adhesive applications this anhydride is not widely used. It gives slightly lower adhesive strength to metal than for example dicyandiamide, but has a somewhat milder curing cycle. Some of the more valuable anhydride hardeners are those that are liquid at room temperature, such as the aliphatic dodecylsuccinic anhydride and the cycloaliphatic methyl-endomethylenetetrahydrophtalic anhydride (methyl "Nadic" anhydride). Certain others in the form of mixtures, especially in the form of eutetic mixture, have the advantage of low melting points, for example tetrahydrophtalic anhydride (m.p. 102oC) and hexahydrophtalic anhydride (m.p. 35 oC). On the other hand, some anhydride, while forming adhesives with high hot-strength, have themselves very high melting points, making them difficult to dissolve, even if the resin is brought to high temperature. Examples of these are ...
The report generally describes phenyl boronic acid anhydride, examines its uses, production methods, patents. Phenyl boronic acid anhydride market situation
An improved surface erodible controlled release composition and the manufacturing thereof, for the continuous administration of biologically active proteins or peptide fragments, is described. The biologically active protein is dissolved in water or a suitable solvent, alone or in combination with stabilizing agents. The solution is either lyophilized or spray dried to obtain a free flowing powder. The powder is then sieved to obtain the desired average particle size. The free flowing powder of the protein or the stabilized protein is then incorporated into a biodegradable matrix formed of fatty acid anhydride, fatty acid and/or a salt thereof. Examples using growth hormone and bovine serum albumin demonstrate enhanced release, stability and controlled release properties for the fatty acid anhydride microparticular system.
Article Petro-Chemical Industry: Wet Scrubber Passes Acid Anhydride Test Case Study. A leading U.S. chemical company upgraded air pollution control of maleic anhydride fumes at one of its overseas plants by installing a venturi scrubber. Selection of...
Retrospective exposure assessment using Bayesian methods.: This paper presents the application of a Bayesian framework for retrospective exposure assessment of
View Details about HS code 2915 for Saturated Acyclic Monocarboxylic Acids Anhydrides products. Check Indian HS classifications List under Harmonized system code heading 2915.
Novel chlorinated 4-methylphthalic acids or anhydrides of the general formula ##STR1## wherein n is an integer of 1, 2 or 3, with the proviso that when n is 1, the chlorine atom is positioned at 3- or 5-position and when n is 2, the chlorine atoms are positioned at 3- and 5-positions. The new compounds are produced by dissolving 4-methylphthalic anhydride in concentrated sulfuric acid or fuming sulfuric acid to form a solution, and reacting the solution with chlorine at room temperature preferably in the presence of a catalytic amount of iodine, thereby to yield a crude product containing a mixture of chlorinated 4-methylphthalic acids. By subjecting the mixture to a thermal dehydration treatment in an inactive organic solvent, each of the chlorinated compounds may be isolated as its corresponding anhydride in the form of crystals.These chlorinated 4-methylphthalic anhydrides are valuable as intermediates for the preparation of dyestuffs or
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
The market research report by QY Research provides detailed study on the overall O-Phthalic anhydride market size, its financial positions, its unique selling points, key products, and key developments. This research report has segmented the O-Phthalic anhydride market based on the segments covering all the domains in terms of type, country, region, forecasting revenues, and market share, along with analysis of latest trends in every sub-segment.. Browse Proper Report including TOC @ http://www.qyresearchgroup.com/market-analysis/global-o-phthalic-anhydride-pa-market-2017.html. The qualitative segmentation of O-Phthalic anhydride market covered in the report gives in-depth information of the overall market. Furthermore, the market size, share, forecast trends, analysis, sales, supply, production, demand, major manufacturers, end-users, and many other vital factors are comprised in the Market Research O-Phthalic anhydride report by QY Research. By these comprehensive data, it is simple to take ...
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
2015 Global O-Phthalic Anhydride Industry Report is a professional and in-depth research report on the worlds major regional market conditions of the O-Phthalic Anhydride industry, focusing on the main regions (North America, Europe and Asia) and the main countries (United States, Germany, Japan and China).. The report firstly introduced the O-Phthalic Anhydride basics: definitions, classifications, applications and industry chain overview; industry policies and plans; product specifications; manufacturing processes; cost structures and so on. Then it analyzed the worlds main region market conditions, including the product price, profit, capacity, production, capacity utilization, supply, demand and industry growth rate etc. In the end, the report introduced new project SWOT analysis, investment feasibility analysis, and investment return analysis.. The report includes six parts, dealing with: 1.) basic information; 2.) the Asia O-Phthalic Anhydride industry; 3.) the North American O-Phthalic ...
CAS No.:118-48-9 Formula:C8H5NO3 Formula weight:163.13 Isatoic anhydride is an isatoic anhydride is a almighty inactivator of chymotrypsin and inactivates stoichiometrically. Isatoic Anhydride is an important admixture in the alertness of serine protease inhibitors. If you want to know about Isatoic anhydride price , please call our Customer Services Hotline 86 592 5365887 or send the…
The process that most failure analysis labs use on a routine basis, is chemical and mechanical etching. The DFAS uses our laser technology to allow an operator to remove individual layers of the mold compound all the way through the lead frames to the substrate. Unlike the uncontrollable chemical etch process, the DFAS Decap process is 100% controllable by the operator through a Graphic User Interface (GUI). The operator can remove the entire compound, individual layers, or sections of the mold compound (operator defined) ranging from the entire sample to just one wire.. The DFAS can import images from a variety of testing processes such as C-SAM, SEM, SAM and X-RAY to show the operator exactly the area of concern within the sample. The DFAS Image Patterning software allows for unparalleled protection and precise removal in and around sensitive components. DFAS eliminates the majority of cost, danger, as well as long term health hazards associated with the use chemicals, all with a process of ...
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.. ...
An improved method for the preparation of saccharide fatty acid polyesters via a two-step process is provided. In the first step, a saccharide is partially esterified so as to contain, on average, between about 1.5 to 3.5 lower acyl ester groups. In the second step, the partially esterified saccharide is reacted with a fatty acid-containing reagent (for example, fatty acids, fatty acid esters, salts of fatty acids, or fatty acid anhydrides) whereby the lower acyl ester groups and the hydroxyl groups on the partially esterified saccharide are replaced with fatty acid ester groups in a transesterification reaction to form a saccharide fatty acid polyesters. The use of a partially esterified saccharide as a reactant in the transesterification reaction allows for a more homogeneous reaction system, less caramelization or other decomposition reactions, and less low molecular weight ester by-product formation. The saccharide fatty acid polyesters, especially the sucrose fatty acid polyesters, are useful as
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
Cyclic acyl phosphoramidates (CAPAs) are important components in several fundamental biological reactions such as protein synthesis and phosphorylation. These structures are particularly interesting in the nucleotide pro-drug approach, Pro-Tide, since they are putative intermediates in one of the hydrolysis steps required for activation. The central role played by the amino acid carboxylate function suggests first the formation of a cyclic mixed phosphorus anhydride, rapidly followed by water attack. To investigate such speculations, we performed quantum mechanical calculations using the B3LYP/6-311+G** level of theory for the plausible mechanisms of action considered. In the five-membered ring case, transition state theory demonstrated how the overall, gas-phase, mechanism of action could be split into two in-line addition-elimination (A-E) steps separated by a penta-coordinate phosphorane intermediate. The difference between five-membered and six-membered ring first A-E was also explored, ...
3-Nitrophthalic anhydride 641-70-3 safety info, 3-Nitrophthalic anhydride chemical safety search, Chemical 3-Nitrophthalic anhydride safety technical specifications ect.
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.
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7-10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306). ...
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.
Coating compositions which comprise: (i) a hydroxy-functional compound containing in the molecule an average of at least two hydroxyl groups; (ii) an anhydride-functional compound containing in the molecule an average of at least two cyclic carboxylic acid anhydride groups; and (iii) an epoxy-functional compound containing in the molecule an average of at least two cycloaliphatic epoxy groups, provide low temperature cure response and excellent durability.
Cihangir Tanyeli; Aysegul Gumus. Synthesis of polymer-supported TEMPO catalysts and their application in the oxidation of various alcohols. Tetrahedron Letters. 2003, 44,(8), 1639-1642.. Didier Villemin; Bouchta Labiad; Andre Loupy. Clay catalysis: A convenient and rapid formation of anhydride from carboxylic acid and isopropenyl acetate under microwave irradiation. Synthetic Communications: An International Journal for Rapid Communication of Synthetic Organic Chemistry. 1993, 23,(4), 419-424.. ...
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.
Global Market Research Report on O-Phthalic anhydride Market Professional Survey Market 2017 is a professional and in-depth complete study on the current state of the O-Phthalic anhydride Market Professional Survey worldwide.
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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...
log Kc at 298 oK & at equilibrium. c. Calculate equilibrium constants, solubility products, pH, free energy changes, and all potentials.. Unit V: Acids and Bases:. 1. Give (with examples) the following definitions of acids and bases:. a. Arrhenius b. Bronsted-Lowry c. Lewis. and recognize acids and bases by applying the definitions.. 2. Define the following terms, using examples where appropriate:. a. Acid anhydride f. Leveling effect. b. Basic anhydride g. Leveling solvent. c. Amphoteric h. Differentiating solvent. d. Conjugate acid (or base) i. Hydrolysis. e. Conjugate acid-base pair j. Solvolysis. 3. Identify which elements tend to form acidic or basic anhydrides and illustrate their formation.. 4. Illustrate the Bronsted-Lowry acid-base theory and identify conjugate acid-base pairs.. 5. Illustrate, with reactions, the amphoteric nature of some substances.. 6. Determine the effect of size and electronegativity on the strengths of binary acids of a Family and of a Period, and list the three ...
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Halstrom J.; Brunfeldt K.; Kovacs K., 1979: Preparation of novel n 9 xanthyl alpha amino acid n carboxy anhydrides for use in peptide synthesis
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.
2-(bromomethyl)phenyl butanoic anhydride - chemical structural formula, chemical names, chemical properties, synthesis references
Page contains details about N-hexadecyl-N-propyl-propane-1,3-diamine surface-modified poly(styrene-co-maleic anhydride) nanofibers . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
Sigma-Aldrich offers Aldrich-B103551, Butyric anhydride for your research needs. Find product specific information including CAS, MSDS, protocols and references.
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 Sigma-Aldrich-11615, Boric anhydride for your research needs. Find product specific information including CAS, MSDS, protocols and references.
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[106 Pages Report] Check for Discount on Global Tetrabromophthalic Anhydride (TBPA) Market Professional Survey Report 2016 report by QYResearch Group. This report Mainly covers the following product types The segment...
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).
Inhaltsangabe: Here, Professor J. Otera brings together for the first time the combined knowledge about this elementary yet multifaceted reaction. Starting from the methodical basics right up to practical applications, this book represents a comprehensive overview of this type of reaction, saving readers time-consuming research among the literature and not just in practical matters. It is all set to become a standard reference for every organic chemist. Its contents include: methodology; reaction of alcohols with carboxylic acids and their derivatives; reactions with carboxylic acids; reaction with esters: transesterification; reaction with acid anhydrides; reaction with acid halides and related compounds; conversion of alcohols to esters through carbonylation synthetic applications; kinetic resolution; enzymatic resolution; nonenzymatic resolution; asymmetric desymmetrization; deacetylation through transesterification; selective esterification; applications to natural product synthesis; new ...
TMA is an organic acid anhydride that is widely used in industry. It can induce specific IgE and cause occupational asthma in sensitized individuals. Persistent occupational asthma, even with antigen/hapten avoidance can be seen is approximately 20% of the cases. Duration of both circulating TMA-specific IgE and specific airway responsiveness was studied in a TMA sensitized Brown Norway rat asthma
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 ...
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 ...
Hm, I think it wouldnt be that a problem to make propionic anhydride [thanks for your spelling tips] from propionic acid. For IAA: I think I have read somewhere that one could make indole-3-acetaldehyde from tryptophan. Me thinks if one would use a stronger oxidizing agent one would get IAA ...
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 ...
An acyl bromide can readily exist in the enol form, and this tautomer is rapidly brominated at the α-carbon. The monobrominated compound is much less nucleophilic, so the reaction stops at this stage. This acyl intermediate compound can undergo bromide exchange with unreacted carboxylic acid via the anhydride, which allows the catalytic cycle to continue until the conversion is complete.. ...
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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 ...
Acetic Anhydride Industry Outlook in the UK to 2016 - Market Size, Company Share, Price Trends, Capacity Forecasts of All Active and Planned Plants provides an in-depth coverage of the UK Acetic Anhydride industry. The research presents major market trends affecting the Acetic Anhydride industry in the UK. The report covers the UK Acetic Anhydride plants and presents installed capacity by key feedstock, process and technology. In addition, it presents Acetic Anhydride demand and production forecasts, end use demand forecasts, price trends, trade balance data and company shares of the major Acetic Anhydride producers in the UK. Overall, the report presents a comprehensive coverage of the UK Acetic Anhydride industry including all the major parameters ...
Acetic Anhydride Industry Outlook in Argentina to 2016 - Market Size, Company Share, Price Trends, Capacity Forecasts of All Active and Planned Plants provides an in-depth coverage of Argentina Acetic Anhydride industry. The research presents major market trends affecting the Acetic Anhydride industry in Argentina. The report covers Argentina Acetic Anhydride plants and presents installed capacity by key feedstock, process and technology. In addition, it presents Acetic Anhydride demand and production forecasts, end use demand forecasts, price trends, trade balance data and company shares of the major Acetic Anhydride producers in Argentina. Overall, the report presents a comprehensive coverage of Argentina Acetic Anhydride industry including all the major parameters ...
7.3. Maleic anhydride demand forecast to 2021. 8. MALEIC ANHYDRIDE SUPPLIERS IN AUSTRIA. 9. CONSUMERS OF MALEIC ANHYDRIDE IN AUSTRIA. Please note that Austria Maleic Anhydride Market Outlook 2017 is a half ready publication and contents are subject to changes and additions. We have all data necessary for report preparation but they need to be retrieved from our databases, organized in a report, updated with the latest information and thus the complete study will be presented. This process takes 2-3 business days after the order is placed. Thus, our clients always get a revised and updated version of the report. *Where available for a company. ...
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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The Report is a professional and in-depth study on the current state of the Polyisobutenyl Succinic Anhydride (PIBSA) market. The report provides a basic overview of the Polyisobutenyl Succinic Anhydride (PIBSA) industry 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), and the sales segment market is also discussed by product type, applications and region.. Access complete report at: https://www.themarketreports.com/report/2017-global-polyisobutenyl-succinic-anhydride-pibsa-industry-research-report. Key companies profiled in this report are Lubrizol, Infineum, Chevron, Afton, Clariant, Orica, Pentagon Chemicals, Dover Chemical, Isca, Italmatch Chemicals, Tianhe Chemical, Jinzhou Kangtai, Cnpc Jinzhou, Wuxi Nanfang Oil Anneng Chemical and more in terms of basic information, product categories, Sales ...
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, Michael (Mike). 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 ...
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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.
Information for Methyltetrahydrophthalic anhydride 26590-20-5 including Methyltetrahydrophthalic anhydride CAS NO 26590-20-5, Methyltetrahydrophthalic anhydride Suppliers, Methyltetrahydrophthalic anhydride Manufacturers, related products of Methyltetrahydrophthalic anhydride.
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Liang, P., Meng, Z., Jiang, Z., Nie, J. and He, Y. (2010), Investigation of stabilizer-free dispersion polymerization process of styrene and maleic anhydride copolymer microspheres. J. Polym. Sci. A Polym. Chem., 48: 5652-5658. doi: 10.1002/pola.24321 ...
70983-65-2 - Alkenes, C20-24 alpha-, polymers with maleic anhydride, mixed decyl octyl esters - Searchable synonyms, formulas, resource links, and other chemical information.
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.
Reports emphasize significant developments in process technology for Maleic Anhydride that have potential implications for the chemical and energy industries
Creative-Proteomics offer cas 108-31-6 MALEIC ANHYDRIDE (2,3-13C2, 99%). We are specialized in manufacturing Stabel Isotope Labeled Analytical Standard products.
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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 ...
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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 ...
The global reaction between acetic anhydride and a fatty acid yields, at equilibrium, an asymmetric acetic-aliphatic anhydride in a medium containing finally: acetic-fatty anhydride, acetic anhydride, fatty acid, acetic acid and fatty anhydride. No solvent or catalyst was used to evaluate the impact of the actual reactivity of the anhydrides. The competition between the formation of acetyl and fatty acyl ester functions was evaluated by determining the ratio of acetyl/fatty acyl groups grafted on solid cellulose. The influence of temperature, reaction time, and length of fatty chain on the total degree of substitution and on the ratio of acetyl/fatty acyl ester functions was investigated. For the first time, a correlation has been established between esterification and the length of the aliphatic chain of the fatty acid. Reactivity of the medium decreased with the number of carbons in the fatty acid, raised to the power 2.37. ...
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
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.. ...
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...
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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:. ...
KEGG Orthology (KO) [BR:nme00001] Environmental Information Processing Membrane transport 02010 ABC transporters [PATH:nme02010] NMB0789 amino acid ABC transporter ATP-binding protein K10010 ABC.CYST.A; cystine transport system ATP-binding protein [EC:3.6.3.-] Enzymes [BR:nme01000] 3. Hydrolases 3.6 Acting on acid anhydrides 3.6.3 Acting on acid anhydrides to catalyse transmembrane movement of substances 3.6.3.- NMB0789 amino acid ABC transporter ATP-binding protein K10010 ABC.CYST.A; cystine transport system ATP-binding protein [EC:3.6.3.-] Transporters [BR:nme02000] ABC Transporters, Prokaryotic Type Phosphate and amino acid transporters Cystine transporter [MD:M00234] [OT] NMB0789 amino acid ABC transporter ATP-binding protein K10010 ABC.CYST.A; cystine transport system ATP-binding protein [EC:3.6.3 ...
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.
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: ...
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
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 ...
This tutorial review highlights the organocatalytic Lewis base functionalisation of carboxylic acids, esters and anhydrides via C1-ammonium/azolium enolates. The generation and synthetic utility of these powerful intermediates is highlighted through their application in various methodologies including aldol-
(PRWEB) May 14, 2014 -- The report Phthalic Anhydride and Derivatives (Plasticizers, Unsaturated Polyester Resins, and Alkyd Resins) Market by Application &
All information about the latest scientific publications of the Clínica Universidad de Navarra. Bioadhesive properties and biodistribution of cyclodextrin-poly(anhydride) nanoparticles
ALPHA CHEMIKA is an ISO 9001:2000 certified manufacturer, supplier & exporter of BOC ANHYDRIDE including all laboratory Chemicals, and offered to our clients at the best industry prices, Inquire us for more products details.
Released on = February 28, 2005, 9:23 pm Press Release Author = richchem inc. Industry = Chemicals Press Release Summary = mineral , magnesite chemical manufacturer and exporter Press Release Body = Richchem inc. is based on dalian chemical mineral corp.manufacture and export::Soda Ash; Caustic soda; magnesium chloride, talc, brucite, dead burnt magnesite, caustic calcined magnesite, magnesium oxide, magnesium carbonate, fused magnesia, saponite, chlorite, talcum.maleic anhydride, phthalic anhydride,ammonium chloride... ...
The polymerization of prochiral bis-anhydrides with diols catalyzed by a cinchona alkaloid was shown to provide chiral polyesters in good yields and with high levels of stereocontrol. The structures of the polyesters were determined by H-1 and C-13 NMR analyses, whereas their size was estimated by both size-exclusion chromatography (SEC) and MALDI-TOF mass spectrometry, which indicated that moderate degrees of polymerization were attained through this step-growth polymerization. The enantioselectivity of the process was evaluated by using chiral HPLC analysis of the bis-lactones resulting from a controlled chemoselective degradation of the polyesters. The best stereocontrol was reached for oligomers formed from bis-anhydride and diol monomers bearing rigid aromatic spacers between the reactive functional groups. In this case, average enantioselectivities were comparable to those observed during ring-opening of simple anhydrides with similar alcohols. In contrast, the use of more flexible spacers between
Isopropanol (syn: isopropyl alcohol, IPA):• forms ketones and unstable peroxides on contact with air or oxygen; the presence of ketones especially methyl ethyl ketone (MEK, 2-butanone) will accelerate the rate of peroxidation• reacts violently with strong oxidisers, powdered aluminium (exothermic), crotonaldehyde, diethyl aluminium bromide (ignition), dioxygenyl tetrafluoroborate (ignition/ ambient temperature), chromium trioxide (ignition), potassium-tert-butoxide (ignition), nitroform (possible explosion), oleum (pressure increased in closed container), cobalt chloride, aluminium triisopropoxide, hydrogen plus palladium dust (ignition), oxygen gas, phosgene, phosgene plus iron salts (possible explosion), sodium dichromate plus sulfuric acid (exothermic/ incandescence), triisobutyl aluminium• reacts with phosphorus trichloride forming hydrogen chloride gas• reacts, possibly violently, with alkaline earth and alkali metals, strong acids, strong caustics, acid anhydrides, halogens, ...
Hypersensitivity pneumonitis may also be caused by fungi or bacteria in humidifiers, heating systems, and air conditioners found in homes and offices. Exposure to certain chemicals, such as isocyanates or acid anhydrides, can also lead to hypersensitivity pneumonitis.. Examples of hypersensitivity pneumonitis include:. Bird fanciers lung: This is the most common type of hypersensitivity pneumonitis. It is caused by repeated or intense exposure to proteins found in the feathers or droppings of many species of birds.. Farmers lung: This type of hypersensitivity pneumonitis is caused by exposure to dust from moldy hay, straw, and grain. ...
CYCLOMETHICONE . AQUA (WATER) . SYNTHETIC FLUORPHLOGOPITE . PEG-9 POLYDIMETHYLSILOXYETHYL DIMETHICONE . PENTYLENE GLYCOL . SODIUM CHLORIDE . QUATERNIUM-18 HECTORITE . CETYL PEG/PPG-10/1 DIMETHICONE . HEXYL LAURATE . POLYGLYCERYL-4 ISOSTEARATE . HDI/TRIMETHYLOL HEXYLLACTONE CROSSPOLYMER . HEXYLENE GLYCOL . DIMETHICONE CROSSPOLYMER . GLYCERIN . PHENOXYETHANOL . PROPYLENE CARBONATE . POLYVINYLALCOHOL CROSSPOLYMER . C9-13 FLUOROALCOHOL . PHOSPHORIC ACID . PORPHYRA UMBILICALIS EXTRACT . FRUCTOSE . GLUCOSE . CAPRYLYL GLYCOL . PARFUM (FRAGRANCE) . TOCOPHERYL ACETATE . METHYLPARABEN . TRISODIUM EDTA . HYDROLYZED LUPINE PROTEIN . CASTANEA SATIVA (CHESNUT) SEED EXTRACT . OCTENYL SUCCINIC ANHYDRIDE . POLYDODECANAMIDEAMINIUM TRIAZADIPHENYLETHENESULFONATE . SILICA . BUTYLPARABEN . ETHYLPARABEN . ALANINE . SODIUM HYALURONATE . UREA . PROPYLPARABEN . ISOBUTYLPARABEN . ASPARTIC ACID . GLUTAMIC ACID . LARIX EUROPEA WOOD EXTRACT . [+/- MAY CONTAIN : CI 77891 (TITANIUM DIOXIDE) . CI 77492 (IRON OXIDE) . CI 77491 ...
Instructions for use: Roll gently between palms before use to warm product Starting from the center of your nail, apply a fine coat from the nail bed to the edge. Repeat for a shiny finish and rich color For a chip-free manicure, use with [Deborah Lippmann base coat id349324] and [top coat id349327] 15ml/ 0.50fl.oz. Ingredients: Butyl Acetate, Ethyl Acetate, Nitrocellulose Acetyl Tributyl Citrate, Phthalic Anhydride/Trimellitic Anhydride/Glycols Copolymer,Isopropyl Alcohol, Stearalkonium Hectorite,Adipic Acid/FumaricAcid/Phthalic, Acid/Tricyclodecane Dimethanol Copolymer,Citric Acid, Biotin, Butylene Glycol (And)Water (And) Camellia Oleifera Leaf Extract,Aucoumea Klaineana Oleo-Resin Extract, [ +/ ] (May Contain)Titanium Dioxide; C.I. 77891 D&C Red #6 Barium Lake; C.I. 15850, D&C Red #7 Calcium Lake; C.I. 15850:1, D&C Red #34 Calcium Lake; C.I. 15850:1, FD&C Yellow #5 Aluminum Lake; C.I. 19140, D&C Yellow #10 Aluminum Lake; C.I. 47005, D&C Blue #1 Aluminum Lake; C.I. 42090, Ferric Ammonium Ferrocyanide

WHMIS classification for Trimellitic anhydride

			 - CNESST
		WHMIS classification for Trimellitic anhydride - CNESST

7. Amoco Corporation, 13-week inhalation toxicity study of trimellitic anhydride in rats (final report) with attachments and ... Clinical and immunologic evaluation of trimellitic anhydride and phthalic anhydride exposed workers using a questionnaire with ... WHMIS (Trimellitic anhydride). Workplace Hazardous Materials Information System. WHMIS 1988 classification - Note to reader ... 10. OECD, «TRIMELLITIC ANHYDRIDE & TRIMELLITIC ACID CAS N°: 552-30-7; 528-44-9.» In: OECD Screening Information Data Set (SIDS ...
more infohttp://www.csst.qc.ca/en/prevention/reptox/Pages/information-sheet-whmis.aspx?langue=a&no_produit=157131

Global Maleic Anhydride Market 2016 Industry Analysis & Forecast 2024Global Maleic Anhydride Market 2016 Industry Analysis & Forecast 2024

Maleic anhydride is the organic compound which is the maleic acids acid anhydride. It is produced in large quantities for the ... Global Maleic Anhydride Market: Overview. Maleic anhydride is the organic compound which is the maleic acids acid anhydride. ... Global Maleic Anhydride Market: Segmentation. The segmentation of the global maleic anhydride market is done on the basis of ... Global Maleic Anhydride Market: Competitive Players. Key market players in the global maleic anhydride market include maleic ...
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Phthalic Anhydride Manufacturers, Suppliers & Exporters in IndiaPhthalic Anhydride Manufacturers, Suppliers & Exporters in India

Contact to Phthalic Anhydride Exporters in India, Phthalic Anhydride Wholesalers, Phthalic Anhydride Distributors and Traders ... Search Indian Phthalic Anhydride Manufacturers and Suppliers Details - ... Deals in Maleic Anhydride, Phthalic Anhydride, Succinic Acid, dl tartaric acid, Succinic anhydride, Dl Malic Acid, Fumaric Acid ... Deals in Phthalic Anhydride, dl tartaric acid, Maleic Anhydride, Fumaric Acid, Malic Acid, L Tartaric Acid ...
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jurnal proses pembuatan phthalic anhydridejurnal proses pembuatan phthalic anhydride

Maleic anhydride , C4H2O3 - PubChem. Maleic anhydride is a cyclic dicarboxylic anhydride that is the cyclic anhydride of maleic ... Phthalic anhydride - Wikipedia. Phthalic anhydride is a principal commercial form of phthalic acid. It was the first anhydride ... PRARANCANGAN PABRIK PHTHALIC ANHYDRIDE DARIO …. TON/TAHUN Prarancangan Pabrik Phthalic Anhydride dari o-Xylene dan Udara dengan ... PRARANCANGAN PABRIK PHTHALIC ANHYDRIDE DENGAN …. Phthalic anhydride merupakan senyawa organik yang sering dimanfaatkan sebagai ...
more infohttps://steunmijnclub.nl/62_jurnal-proses-pembuatan-phthalic-anhydride.html

Styrene Maleic Anhydride - Bond Angles and Lengths | Physics Forums - The Fusion of Science and CommunityStyrene Maleic Anhydride - Bond Angles and Lengths | Physics Forums - The Fusion of Science and Community

Similar Discussions: Styrene Maleic Anhydride - Bond Angles and Lengths * Acidity of fumaric acid and maleic acid (Replies: 4) ... Styrene and maleic anhydride can be copolymerized in a number of ways that greatly change the resulting polymer. Random ... Styrene Maleic Anhydride is a tricky polymer that Ive been researching over the last few days. There is very little ... Try visualizing the styrene polymer, first and then see how one maleic anhydride can disrupt that regular polymer coil. ...
more infohttps://www.physicsforums.com/threads/styrene-maleic-anhydride-bond-angles-and-lengths.607600/

Asia-Pacific Maleic Anhydride(MAH) Market Report 2017 - QY ResearchAsia-Pacific Maleic Anhydride(MAH) Market Report 2017 - QY Research

Research Report on Asia-Pacific Maleic Anhydride(MAH) Market Report 2017. The Report includes market price, demand, trends, ... Figure DSM Maleic Anhydride(MAH) Sales (K MT) and Growth Rate (2012-2017). Figure DSM Maleic Anhydride(MAH) Sales Market Share ... Figure China Maleic Anhydride(MAH) Sales Price (USD/MT) Trend (2012-2017). Table China Maleic Anhydride(MAH) Sales Volume (K MT ... Figure China Maleic Anhydride(MAH) Sales Volume Market Share by Type in 2016. Table China Maleic Anhydride(MAH) Sales Volume (K ...
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Phthalic Anhydride | Gautam Zen InternationalPhthalic Anhydride | Gautam Zen International

Phthalic Anhydride Raw Material for production of plasticizers, polyester resins, alkyd resins used in paints and lacquers & ... PHTHALIC ANHYDRIDE FROM OVERSEAS SOURCES:. Our manufacturer maintains rigorous. standards of quality control with an ISO 9002 ...
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Methyltetrahydrophthalic anhydride 26590-20-5, Information for Methyltetrahydrophthalic anhydride 26590-20-5, Suppliers of...Methyltetrahydrophthalic anhydride 26590-20-5, Information for Methyltetrahydrophthalic anhydride 26590-20-5, Suppliers of...

Methyltetrahydrophthalic anhydride Suppliers, Methyltetrahydrophthalic anhydride Manufacturers, related products of ... Information for Methyltetrahydrophthalic anhydride 26590-20-5 including Methyltetrahydrophthalic anhydride CAS NO 26590-20-5, ... About Methyltetrahydrophthalic anhydride. Powerd by ChemNet Methyltetrahydrophthalic anhydride. Product Name:. ... Enquiry for thyltetrahydrophthalic anhydride Address:. Room A101, No.751, YiChang Road, Shanghai, China.. Other products:. • β- ...
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Buy Phthalic Anhydride - Tech Grade - 99.9% from EchemiBuy Phthalic Anhydride - Tech Grade - 99.9% from Echemi

Submit inquiry to get the current price of Phthalic Anhydride in real time on Echemi. ... Buy Phthalic Anhydride - Tech Grade - 99.9% from Echemi online. ... Phthalic Anhydride(85-44-9). Tech Grade 99.9% 25kgs/0.1kg Bag ...
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World Acetic Anhydride Market: Opportunities and Forecasts, 2014 - 2020World Acetic Anhydride Market: Opportunities and Forecasts, 2014 - 2020

The acetic anhydride market is segmented by application and geography. On the basis of application, the market is divided into ... Similarly, acetic anhydride, in addition to its several other applications, is used often in the form of derivatives or sources ... Acetic anhydride, is a colorless liquid, primarily used in the manufacturing of cellulose acetate. Cellulose acetate is used in ... Acetic anhydride is used to manufacture tetraacetylethylenediamine (TAED), which is utilized as a bleach activator in laundry ...
more infohttps://www.bigmarketresearch.com/acetic-anhydride-market

Reversible acylation and inhibition of aggregation of platelets by substituted maleic anhydrides<...Reversible acylation and inhibition of aggregation of platelets by substituted maleic anhydrides<...

The maleic anhydrides, a series of reversible acylating agents, have now been shown to produce the aspirin-type defect in ... The maleic anhydrides, a series of reversible acylating agents, have now been shown to produce the aspirin-type defect in ... The maleic anhydrides, a series of reversible acylating agents, have now been shown to produce the aspirin-type defect in ... The maleic anhydrides, a series of reversible acylating agents, have now been shown to produce the aspirin-type defect in ...
more infohttps://ohsu.pure.elsevier.com/en/publications/reversible-acylation-and-inhibition-of-aggregation-of-platelets-b

China Methyl Hexahydrophthalic Anhydride (MHHPA) - China Mhhpa, Methyl Hexahydrophthalic Anhydride;China Methyl Hexahydrophthalic Anhydride (MHHPA) - China Mhhpa, Methyl Hexahydrophthalic Anhydride;

Methyl Hexahydrophthalic Anhydride; from Methyl Hexahydrophthalic Anhydride (MHHPA) - Heze Kingvolt Chemical Co., Ltd. ... China Methyl Hexahydrophthalic Anhydride (MHHPA), Find details about China Mhhpa, ... Methy hexahydrophthalic anhydride is made from methy tetrahydrophthalic anhydride by catalytic hydrogenation. It is an ... Mhhpa, Methyl Hexahydrophthalic Anhydride;, 25550-51-0 manufacturer / supplier in China, offering Methyl Hexahydrophthalic ...
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Phthalic Anhydride Manufacturers, Stockists, Suppliers, Dealers in Dubai - Dubai Yellow Pages OnlinePhthalic Anhydride Manufacturers, Stockists, Suppliers, Dealers in Dubai - Dubai Yellow Pages Online

Buy High Quality Phthalic Anhydride Products from Dubai Phthalic Anhydride Suppliers and Manufacturers at Dubai Yellow Pages ...
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Formation of citraconic anhydride via condensation of dialkyl succinates and formaldehyde<...Formation of citraconic anhydride via condensation of dialkyl succinates and formaldehyde<...

Shekhawat, D., Nagarajan, K., Jackson, J. E., & Miller, D. J. (2002). Formation of citraconic anhydride via condensation of ... Formation of citraconic anhydride via condensation of dialkyl succinates and formaldehyde. Applied Catalysis A: General. 2002; ... Shekhawat, Dushyant ; Nagarajan, Kirthivasan ; Jackson, James E. ; Miller, Dennis J./ Formation of citraconic anhydride via ... Shekhawat, D, Nagarajan, K, Jackson, JE & Miller, DJ 2002, Formation of citraconic anhydride via condensation of dialkyl ...
more infohttps://scholars.opb.msu.edu/en/publications/formation-of-citraconic-anhydride-via-condensation-of-dialkyl-suc-4

Avidin acylation prevents the complement-dependent lysis of avidin-carrying erythrocytes | Biochemical JournalAvidin acylation prevents the complement-dependent lysis of avidin-carrying erythrocytes | Biochemical Journal

A 50% modification of avidin by succinic anhydride (pI about 7.0) allows preparation of immunoerythrocytes, which retain ... Acylation of avidin with succinic anhydride strongly decreases its ability to induce complement-dependent haemolysis. However, ...
more infohttp://www.biochemj.org/content/273/2/393

Anhydride | Encyclopedia.comAnhydride | Encyclopedia.com

... 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 ...
more infohttps://www.encyclopedia.com/science-and-technology/chemistry/compounds-and-elements/anhydride

Thiodiglycolic anhydrideThiodiglycolic anhydride

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 ...
more infohttps://webbook.nist.gov/cgi/inchi/InChI%3D1S/C4H4O3S/c5-3-1-8-2-4

Maleic anhydrideMaleic anhydride

Other names: 2,5-Furandione; cis-Butenedioic anhydride; Dihydro-2,5-dioxofuran; Maleic acid anhydride; Toxilic anhydride; ... Maleic anhydride, briquettes; Anhydrid kyseliny maleinove; Maleinanhydrid; Rcra waste number U147; UN 2215; 2,5-Furanedione; M ...
more infohttps://webbook.nist.gov/cgi/cbook.cgi?ID=C108316&Units=CAL&Mask=400

Acetic anhydride - WikipediaAcetic anhydride - Wikipedia

"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 ...
more infohttps://en.m.wikipedia.org/wiki/Acetic_anhydride

ICSC 1374 -    TETRACHLOROPHTHALIC ANHYDRIDEICSC 1374 - TETRACHLOROPHTHALIC ANHYDRIDE

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 ...
more infohttp://inchem.org/documents/icsc/icsc/eics1374.htm

ICSC 1312 -    SUCCINIC ANHYDRIDEICSC 1312 - SUCCINIC ANHYDRIDE

See Also: Toxicological Abbreviations Succinic Anhydride (IARC Summary & Evaluation, Volume 15, 1977) ...
more infohttp://www.inchem.org/documents/icsc/icsc/eics1312.htm

Anhydride Monomers - Monomers | Sigma-AldrichAnhydride Monomers - Monomers | Sigma-Aldrich

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 ...
more infohttps://www.sigmaaldrich.com/materials-science/material-science-products.html?TablePage=20203556

AnhydrideAnhydride

Monomer-Polymer & Dajac Laboratories Inc. is a manufacturer and supplier of specality monomers, speciality polyners, diagnoctic reagents, flourinated monomers, reactive surfactants, epoxy resins and oligomers and other speciality chemicals.
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Trimellitic anhydride (HSG 71, 1992)Trimellitic anhydride (HSG 71, 1992)

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 ...
more infohttp://www.inchem.org/documents/hsg/hsg/hsg71.htm

4-Nitrophthalic anhydride 54668424-Nitrophthalic anhydride 5466842

Testing Status of 4-Nitrophthalic anhydride 5466842. CASRN: 5466-84-2. Formula: C8-H3-N-O5. Synonyms/Common Names. *1,3- ...
more infohttps://ntp.niehs.nih.gov/testing/status/agents/ts-5466842.html
  • 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)
  • In this report, the Asia-Pacific Maleic Anhydride(MAH) market is valued at USD XX million in 2016 and is expected to reach USD XX million by the end of 2022, growing at a CAGR of XX% between 2016 and 2022. (qyresearchreports.com)
  • Other important acid anhydrides include maleic anhydride and phthalic anhydride. (encyclopedia.com)
  • 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)
  • This invention relates to the production of acid anhydrides especially maleic anhydride and catalysts therefor. (google.com)
  • The hydrocarbon is generally oxidised by contacting it in the vapour phase together with oxygen with a solid catalyst and recovering maleic anhydride from the product. (google.com)
  • In this case the product gas, after recovery of maleic anhydride, is usually vented or burned. (google.com)
  • The oxidation may also be carried out as disclosed in German Offenlegunschrift No. 2,412,913 by mixing the hydrocarbon with air in a concentration higher than the upper explosive limit, contacting it with a catalyst under appropriate conditions of temperature and pressure and recovering maleic anhydride from the product gas (i.e. a "fuel rich" system). (google.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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • Anthracene was the diene and maleic anhydride was the dienophile. (bartleby.com)
  • 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 olefins 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)
  • Alkenyl succinic anhydrides (ASA) are modified five-membered succinic anhydrides bearing a branched iso-alkenyl chain (C14 to C22). (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)
  • Anhydrides are very versatile as they can undergo condensation reactions to give polyesters, -imides, -ester-amides, and -ester-imides. (sigmaaldrich.com)
  • In the United States alkenylsuccinic anhydrides are the preferred paper sizing agents, whereas in Europe, alkyl ketene dimers (AKDs) predominate. (wikipedia.org)
  • What is an example of a basic anhydride? (reference.com)
  • Only the oxides formed by the alkali metals and alkali earth metals, Groups I and II on the periodic table respectively, are basic anhydrides. (reference.com)
  • All of the basic anhydrides, which have a very high charge and small size, can be produced by removing the water from their corresponding hydroxide at high temperatures. (reference.com)
  • Global Tri-Mellitic-Anhydride(TMA)Industry 2016 Market Research Report ​is a new market research publication announced by Reportstack. (pitchengine.com)
  • The Tri-Mellitic-Anhydride (TMA) market analysis is provided for the international market including development history, competitive landscape analysis, and major regions' development status. (pitchengine.com)
  • 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)
  • additional anhydrides commonly used for this application are listed in the Crosslinking Agents and Additives for Epoxides section. (sigmaaldrich.com)