H2Cr2O7

H2Cr2O7, also known as dichromate, is a chemical compound consisting of two chromium atoms, two oxygen atoms, and two hydrogen atoms. It is a strong oxidizing agent and is commonly used in various industrial and laboratory applications. Dichromate is typically found in its acidic form, H2Cr2O7, which is a yellow crystalline solid. It is highly soluble in water and can be prepared by the oxidation of chromium(III) compounds with strong oxidizing agents such as potassium permanganate or sodium hypochlorite.

The compound is used in the manufacture of dyes, pigments, and other chemicals. It is also used as a corrosion inhibitor and in the treatment of wastewater. In the laboratory, H2Cr2O7 is used as a titrant in redox titrations and as a reagent in the preparation of other chromium compounds.

Dichromate is toxic and can cause skin and eye irritation. It is also a potent carcinogen and can cause damage to the liver, kidneys, and other organs. Proper handling and disposal procedures should be followed when working with this compound to minimize the risk of exposure and environmental contamination.