The salt is popular in laboratories because it is not deliquescent, in contrast to the more industrially relevant salt sodium dichromate. (wikipedia.org)
Potassium dichromate is usually prepared by the reaction of potassium chloride on sodium dichromate. (wikipedia.org)
Treatment with cold sulfuric acid gives red crystals of chromic anhydride (chromium trioxide, CrO3): K2Cr2O7 + 2 H2SO4 → 2 CrO3 + 2 KHSO4 + H2O On heating with concentrated acid, oxygen is evolved: 2 K2Cr2O7 + 8 H2SO4 → 2 K2SO4 + 2 Cr2(SO4)3 + 8 H2O + 3 O2 Potassium dichromate has few major applications, as the sodium salt is dominant industrially. (wikipedia.org)
Like other chromium(VI) compounds (chromium trioxide, sodium dichromate), potassium dichromate has been used to prepare "chromic acid" for cleaning glassware and etching materials. (wikipedia.org)
The inhibition of potassium dichromate on the corrosion protection of mild steel embedded in concrete and partially immersed in sulphuric acid and sodium chloride environments was evaluated at ambient temperatures. (edu.ng)
As a result of these nominations, NTP studied the short-term toxicity and long-term carcinogenicity of sodium dichromate dihydrate, a hexavalent chromium compound, administered to rodents in drinking water. (nih.gov)
NTP found that sodium dichromate dihydrate in the drinking water caused oral cancer in rats and small intestine cancer in mice. (nih.gov)
For a full list of studies, see the NTP testing status page for sodium dichromate dihydrate, a hexavalent chromium compound. (nih.gov)
NTP reported that exposure to sodium dichromate dihydrate caused increased tissue growth and ulcers in the stomach of rats. (nih.gov)
This use covers passivation of non-aluminium metallic coatings using sodium dichromate and/or potassium dichromate in the aerospace and defence industry and its supply chains where any of the following key functions are required: corrosion resistance (and active corrosion inhibition), chemical resistance, adhesion to subsequent layer, layer thickness, temperature resistance, electrical resistivity, and pre-treatment compatibility. (hse.gov.uk)
This applied for use involves the continued use of sodium dichromate or potassium dichromate across approximately 30 sites in Great Britain. (hse.gov.uk)
Oxidizers (e.g. hydrogen peroxide, potassium dichromate, sodium nitrate) are not necessarily combustible in themselves, they are substances that cause or contribute to the combustion of other materials. (lu.se)
Chromate6
Alternatively, it can be also obtained from potassium chromate by roasting chromite ore with potassium hydroxide. (wikipedia.org)
4 K2Cr2O7 → 4 K2CrO4 + 2 Cr2O3 + 3 O2 When an alkali is added to an orange-red solution containing dichromate ions, a yellow solution is obtained due to the formation of chromate ions (CrO2−4). (wikipedia.org)
For example, potassium chromate is produced industrially using potash: K2Cr2O7 + K2CO3 → 2 K2CrO4 + CO2 The reaction is reversible. (wikipedia.org)
Potassium Dichromate can also be obtained from its related compound, potassium chromate (K 2 CrO 4 ), which reacts with acids to give the dichromate salt. (chemtradeasia.com)
It is widely used as an oxidizing agent in organic chemistry, and is used to manufacture chrome oxides, potassium chromate, chrome yellow pigment, chromic potassium sulfate. (chemtradeasia.com)
It is soluble in water and in the dissolution process it ionizes: K2Cr2O7 → 2 K+ + Cr 2O2− 7 Cr 2O2− 7 + H2O ⇌ 2 CrO2− 4 + 2 H+ Potassium dichromate is an oxidising agent in organic chemistry, and is milder than potassium permanganate. (wikipedia.org)
In contrast, potassium permanganate tends to give carboxylic acids as the sole products. (wikipedia.org)
Black & White bleach is typically an acidic solution of potassium permanganate (purple) or potassium dichromate (orange) which serves to dissolve developed silver bromide particles while leaving undeveloped particles unaltered. (hi-beam.net)
Bichromate1
The photosensitizing solution is made with distilled water and any of the following: ammonium bichromate, ammonium dichromate, potassium bichromate or potassium dichtomate. (polymetaal.nl)
Common inorganic chemical reagent2
Potassium dichromate, K2Cr2O7, is a common inorganic chemical reagent, most commonly used as an oxidizing agent in various laboratory and industrial applications. (wikipedia.org)
Potassium dichromate has important uses in photography, it is a common inorganic chemical reagent. (goldstreetstudios.com.au)
Reacts2
Your immune system reacts with its defense mechanisms with each exposure of Potassium Dichromate to your skin. (orlandoskindoc.com)
When the potassium dichromate solution in the Breathalyzer™ reacts with ethanol, the potassium dichromate loses an oxygen atom. (duke.edu)
Reaction4
The results from your patch testing showed a positive reaction (contact allergy) to Potassium Dichromate. (orlandoskindoc.com)
Silver nitrate serves as a catalyst for the reaction to increase the rate at which the dichromate gets reduced. (duke.edu)
The three parts are the mouthpiece, two glass vials for the chemical reaction mixtures and photocells which measure the color change associated with the reaction of the dichromate and alcohol. (alcoholalert.com)
Many chemical systems exhibit a regular pattern of precipitate bands known as Liesegang rings in tribute to the chemist Raphael E. Liesegang who demonstrated them using a reaction of silver nitrate and potassium dichromate. (ubc.ca)
Sulfuric2
A potassium dichromate solution in sulfuric acid can be used to produce a reversal negative (that is, a positive transparency from a negative film). (wikipedia.org)
In this machine, a suspect's breath is bubbled through one chamber of sulfuric acid, potassium dichromate, silver nitrate and water. (alcoholalert.com)
Exposure6
In 1839, Mungo Ponton discovered that paper treated with a solution of potassium dichromate was visibly tanned by exposure to sunlight, the discoloration remaining after the potassium dichromate had been rinsed out. (wikipedia.org)
In 1852, Henry Fox Talbot discovered that exposure to ultraviolet light in the presence of potassium dichromate hardened organic colloids such as gelatin and gum arabic, making them less soluble. (wikipedia.org)
Persistence of eczema in Potassium Dichromate sensitive people can occur for long periods even after exposure has stopped. (orlandoskindoc.com)
The present study examines the toxicity of combined exposure to potassium dichromate (PDC) and an oral contraceptive, levonorgestrel in the kidney of female rats. (neoplasiaresearch.com)
The study suggests that combined exposure to potassium dichromate and levonorgestrel worsened nephrotoxicity in rats by increasing oxidative stress. (neoplasiaresearch.com)
All loading levels of the test item and the control were analytically verified via analysis of the total organic carbon (TOC, according to DIN EN 1484) at the start of the exposure intervals (0 and 24 hours) and at the end of the exposure intervals (24 and 48 hours). (europa.eu)
Hexavalent2
The potential reproductive toxicity of potassium dichromate (hexavalent) was evaluated in Sprague-Dawley rats. (nih.gov)
Potassium dichromate (hexavalent) was administered at dose levels of 0, 15, 50, 100, and 400 ppm in the diet for nine weeks followed by an eight week recovery (potassium dichromate free) period. (nih.gov)
Chrome1
The main use is as a precursor to potassium chrome alum, used in leather tanning. (wikipedia.org)
Chemicals1
Studies using electron spin resonance (ESR) spectroscopy and scanning laser cytometry demonstrated that cells having sustained elevation of GSH levels did not attenuate free radical formation and associated oxidative stress compared with parent cells when treated with the prooxidant chemicals, menadione or potassium dichromate. (nih.gov)
Chromic acid1
Potassium dichromate is used for the preparation of chromic acid for cleaning agents employed in glassware materials. (chemtradeasia.com)
Sulfate1
The reduction converts orange potassium dichromate into a green solution containing chromium sulfate. (duke.edu)
Oxidation2
For example, menthone may be prepared by oxidation of menthol with acidified dichromate. (wikipedia.org)
Aldehydes reduce dichromate from the +6 to the +3 oxidation state, changing color from orange to green. (wikipedia.org)
Toxicity2
Genetic Toxicity Evaluation of Potassium Dichromate in Salmonella/E.coli Mutagenicity Test or Ames Test. (nih.gov)
Results of the study indicate that potassium dichromate treatment did produce a slight hematopoietic toxicity at the 400 ppm dose level based upon MCV and MCH values in the 400 ppm animals. (nih.gov)
Cement2
Potassium dichromate is considered as an important ingredient for the production of cement. (chemtradeasia.com)
Potassium dichromate has the unique properties such as to improve the density & texture of cement. (chemtradeasia.com)
K2Cr2O71
Potassium Dichromate is an ionic solid and well-known chemical reagent with the formula K2Cr2O7. (gulpmatrix.com)
Organic1
Potassium Dichromate is widely used as an oxidizing agent in organic chemistry. (chemtradeasia.com)
Solution2
Potassium dichromate solution with sulphuric acid solution is used to produce a reversal negative film. (chemtradeasia.com)
Over the period 5-8 days after inoculation, faeces are collected in trays containing 2% (w/v) potassium dichromate solution, while food intake is restricted. (nih.gov)
Substance1
Reference substance: For evaluation of the algal quality and experimental conditions, potassium dichromate is tested as a positive control twice a year to demonstrate satisfactory test conditions. (europa.eu)
Mineral3
Potassium dichromate with strong mineral acid is used as a photographic screen printing. (chemtradeasia.com)
We have copper and cobalt oxide collectors, gold leaching agent that completely replaces cyanide,depressant of easy floating gangue, frother for high mud content mineral ore, tin collector, reagent to replace potassium dichromate, etc. (chinaqualitycrafts.com)
Potassium is an essential mineral necessary for the normal functioning of all cells, tissues and organs of living things. (scienceforming.com)
Positive1
Patch testing to 0.5% potassium dichromate is often positive. (medscape.com)
Free1
Products listed on your contact allergen resource database will be free of Potassium Dichromate and safe to use. (orlandoskindoc.com)
Study1
An overview of Genetic Toxicology Bacterial Mutagenicity study conclusions related to Potassium dichromate (7778-50-9). (nih.gov)
Orange1
Potassium dichromate, also called potassium dichromate (VI), is an orange-colored crystalline toxic inorganic chemical. (chemtradeasia.com)
Effects1
The author concludes that a health hazard from potassium-dichromate existed, and that the artist's symptoms were consistent with the known primary irritant and sensitization effects of potassium- dichromate. (cdc.gov)
Individuals1
Previously quiescent green-colored tattoos may become inflamed during patch testing in potassium dichromate-sensitive individuals. (medscape.com)
Improvement1
Steel-reinforced concrete sample admixed with 3 and 9 g potassium dichromate inhibitor had the highest improvement in compressive strength.The potassium dichromate inhibitor was most effective amongst other inhibitor concentrations used when 7.5 g was admixed with the sample in the H2SO4 medium. (edu.ng)
Samples1
Environmental air samples, wipe samples, and vacuum samples were analyzed for potassium-dichromate (7778509) at an artist's workshop (SIC-7332) in Bucyrus, Ohio, on February 9 and 10, 1981. (cdc.gov)