Potassium Dichromate

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potassium dichromate

[pə′tas·ē·əm dī′krō‚māt]
(inorganic chemistry)
K2Cr2O7 Poisonous, yellowish-red crystals with metallic taste; soluble in water, insoluble in alcohol; melts at 396°C, decomposes at 500°C; used as an oxidizing agent and analytical reagent, and in explosives, matches, and electroplating. Also known as potassium bichromate; red potassium chromate.

Potassium Dichromate


K2Cr207. Potassium dichromate is found in nature as the mineral lopezite. It is widely used in certain types of volumetric analysis and as an oxidizing agent in pyrotechnics, photography, and the manufacture of safety matches.

References in periodicals archive ?
The most prominent among them were 16 and 12 percent increase from the post- mordanting of potassium dichromate and post- treatment of UV- SUN, respectively (Fig- 3).
Metal allergens in the testing kit included potassium dichromate, nickel sulphate and cobalt sulphate.
The oocysts collected in potassium dichromate had sporulated by the time of examination, which facilitated and confirmed identification as Cyclospora spp.
Potassium Dichromate is a widely used chemical for oxidation reactions in undergraduate chemistry teaching labs.
In another study, the in vivo effects of nickel chloride and/or potassium dichromate in the ovary of adult mice were determined.
Chromium in the hexavalent state (Cr VI) is a human carcinogen (as in the orange colored potassium dichromate or bi-chromate) while trivalent chromium (Cr III) (as in the green colored chromium III chloride) appears not to be.
These characteristics included reproduction when bits of the gyrating liquid mercury would break into two, primitive metabolism with the reaction between the mercury and the acid plus potassium dichromate, and response to a stimulus in the movement caused by the addition of the acidified potassium dichromate to the mercury.
The Walkley-Black organic C method (Walkley and Black 1934) uses the heat of dilution from the addition of sulfuric acid to a potassium dichromate solution to help oxidise the organic matter.
The oxidizable substances in the test sample volume are oxidized by a known quantity of potassium dichromate in the presence of mercuric sulfate and silver catalyst in an environment of concentrated sulfuric acid in a defined time interval.
Potassium dichromate solution was diluted with the growth media (SDA) to obtain varying concentrations from 0.
Ten nauplii added in 3 mL of ASW was used as a negative control while potassium dichromate was used as positive control during the experiment.