Chromium(III) sulfate hydrate (Cr2(SO4)3•xH2O)-Crystalline

Characteristic




Chromium(III) sulfate usually refers to the inorganic compounds with the formula Cr2(SO4)3 • xH2O, where x can range from 0 to 18. Additionally, ill-defined but commercially important "basic chromium sulfates" are known. These salts are usually either violet or green solids that are soluble in water. 




Chemical formula:Cr2(SO4)3 • 12H2O

Molar mass:392.16 g/mol;608.363 g/mol (dodecahydrate);716.45 g/mol (octadecahydrate)

Appearance:reddish-brown crystals (anhydrous), purple crystals (hydrated)

Density:3.10 g/cm3 (anhydrous);1.86 g/cm3 (pentadecahydrate);1.709 g/cm3 (octadecahydrate)

Melting point:90 °C

Boiling point:>700 °C (decomposes to chromic acid)

Solubility in water:insoluble (anhydrous);soluble (hydrated)

Solubility:soluble in alcohol;practically insoluble in acid

Magnetic susceptibility (χ):+11,800·10−6 cm3/mol




Application




Chromium(III) sulfate hydrate is widely used in making chrome tanned leather, paints, inks and ceramics. It is also used in preparation of chromium metal, dye, in printing and dyeing industry. It is involved in the preparation of chrome catalyst.