Characteristic

 

Chromium(III) chloride (also called chromic chloride) describes any of several compounds of with the formula CrCl₃ • xH2O, where x can be 0, 5, and 6. The anhydrous compound with the formula CrCl₃ is a violet solid. The most common form of the trichloride is the dark green hexahydrate,  CrCl₃ • 6H2O.

Chemical formula： CrCl₃

Molar mass：158.36 g/mol 

Appearance：purple 

Density： 2.87 g/cm³ 

Melting point：1,152 °C (2,106 °F; 1,425 K)

Boiling point：1,300 °C (2,370 °F; 1,570 K) decomposes

Solubility in water：slightly soluble

Solubility：insoluble in ethanol;insoluble in ether, acetone

Acidity (pKa):2.4 (0.2M solution)

Magnetic susceptibility (χ):+6890.0·10⁻⁶ cm³/mol

Crystal structure:YCl₃ structure

 

Application

 

Chromium chloride and chromium sulfate have been used as dietary supplements. Chromium(III) chloride and chromium(III) sulfate can be used in the manufacture of food for particular nutritional uses and in food supplements. It is found in miscellaneous applications, such as catalysts, hardeners, mordents, crosslinking and binding agents. It is used to make very pure chromium and other chromium compounds, as a mordant in dyeing cotton, and in chromizing metals. It is too used for trivalent electroplating .