CrCl3 is the chemical formula of a salt called chromium(III) chloride, a compound with molar mass of 158.355 grams per mole. It exists as a purple anhydrous form with a density of 2.87 grams per cubic centimeter and a green hexahydrate with a density of 1.76 grams per cubic centimeter.
Anhydrous chromium(III) chloride can be obtained from the chlorination reactions of chromium metal or chromium(III) oxide. It creates complexes with alkali metal chlorides, such as potassium chloride. It is classified as a hard Lewis acid, and it forms adducts with compounds such as pyridine. It is used in organic chemistry, and it is an ingredient for dyes that are used to color wool.