Potassium chromium sulfate is an inorganic compound with the chemical formula KCr(SO₄)₂·12H₂O. It has a black-purple lustrous crystalline or light purple granules or powder with a melting point of 89 °C and a relative density of 1.83. This compound is soluble in water but not in ethanol. At different temperatures, it changes in color, such as purple in cold water and green when heated.

Uses of Potassium chromium sulfate

1. Analytical reagents: used as reagents in chemical analysis to help detect and quantify specific chemical substances.

2. Photographic Fixer: Acts as a firming agent for photographic film, helping to fix images and improve the quality of the film.

3. Dye production: Used as a chromium complexing agent to help produce specific types of dyes.

4. Printing and dyeing mordant: In the printing and dyeing process of textiles, it is used as a mordant to help the dye better adhere to the fiber.

5. Glass and ceramics: In glass and ceramic production, potassium chromium sulfate is used to improve the specific properties of the product.

6. Production fracturing fluid: In oil extraction, it is used as a cross-linking agent for fracturing fluids to help improve the production of oil wells.

7. Tanning agent: In leather processing, it is used to tann leather to enhance its durability and elasticity.

8. Laboratory and industrial applications: In laboratory and industrial production, chemicals used as fixatives and photoplates in microscopic analysis.