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Safety data sheet (SDS) Fisher Scientific: Related compounds Other anions. Potassium dichromate ... Potassium chromate is the inorganic compound with the formula K 2 ...
Potassium dichromate, K 2 Cr 2 O 7, is a common inorganic chemical reagent, most commonly used as an oxidizing agent in various laboratory and industrial applications. As with all hexavalent chromium compounds, it is acutely and chronically harmful to health.
Chromyl chloride can be prepared by the reaction of potassium chromate or potassium dichromate with hydrogen chloride in the presence of sulfuric acid, followed by distillation. [3] [4] K 2 Cr 2 O 7 + 6 HCl → 2 CrO 2 Cl 2 + 2 KCl + 3 H 2 O. The sulfuric acid serves as the dehydration agent.
An example SDS, including guidance for handling a hazardous substance and information on its composition and properties. A safety data sheet (SDS), [1] material safety data sheet (MSDS), or product safety data sheet (PSDS) is a document that lists information relating to occupational safety and health for the use of various substances and products.
Chrome alum. Chromium alum is produced from chromate salts or from ferrochromium alloys. Concentrated aqueous solutions of potassium dichromate can be reduced, usually with sulfur dioxide but also with alcohols or formaldehyde, in the presence of sulfuric acid at temperatures <40 °C.
Potassium chlorochromate was originally prepared by treating potassium dichromate with hydrochloric acid. An improved route involves the reaction of chromyl chloride and potassium chromate: [5] K 2 CrO 4 + CrO 2 Cl 2 → 2KCrO 3 Cl. The salt consists of the tetrahedral chlorochromate anion. The average Cr=O bond length is 159 pm, and the Cr-Cl ...
Potassium hypochromate also reacts with acids such as hydrochloric acid to form chromium(III) oxide, potassium chromate, and potassium chloride: [2] 6 K 3 CrO 4 + 10 HCl → 4 K 2 CrO 4 + Cr 2 O 3 + 5 H 2 O + 10 KCl. Other reducing agents such as hydroperoxides can oxidize the hypochromate ion into chromate ions. [1]
Potassium peroxochromate is prepared by treating potassium chromate with hydrogen peroxide at 0 °C: . 2 CrO 2− 4 + 8 H 2 O 2 → 2 [Cr(O 2) 4] 2− + 8 H 2 O. The intermediate tetraperoxochromate(VI) is reduced by hydrogen peroxide, forming tetraperoxochromate(V): [3] [4]