Potassium dichromate

Potassium dichromate is an inorganic compound with the formula K2Cr2O7. It is a common laboratory chemical, frequently used as an oxidizing agent. Despite its widespread use, potassium dichromate is highly toxic and carcinogenic.

Chemical properties

Potassium dichromate is a bright orange crystalline solid. It is highly corrosive and a strong oxidizing agent. The compound is soluble in water and its solutions have a characteristic orange color.

Production

Potassium dichromate is produced industrially by roasting chromite ore with potassium hydroxide, followed by a reaction with oxygen.

Uses

Potassium dichromate has a wide range of uses. It is used in laboratories as an oxidizing agent, and in the field of photography for hardening emulsions and toning prints. It is also used in leather tanning, as a wood stain, and in the production of safety matches.

Health effects

Exposure to potassium dichromate can cause severe health effects. It is a known carcinogen and can cause skin and eye irritation, respiratory problems, and damage to the liver and kidneys. It is also harmful if swallowed.

Regulation

Due to its toxicity, the use of potassium dichromate is heavily regulated. In the European Union, it is classified as a Category 1B Reproductive Toxin, and its use in many applications is restricted by the REACH Regulation.

See also

• Chromium
• Potassium permanganate
• Oxidizing agent