Chromium(III) perchlorate is an inorganic compound, a salt with the chemical formula Cr(ClO4)3.

It's hexahydrate Cr(ClO4)3·6H2O is a cyan solid that dissolves in water.

Chromium perchlorate can prepared by reacting chromium(III) oxide or chromium(III) hydroxide with perchloric acid: Chromium perchlorate has many hydrates, such as the hexahydrate Cr(ClO4)3·6H2O[1] and a nonahydrate Cr(ClO4)3·9H2O.

[3] All of them are cyan substances that are soluble in water.