Characteristic

Chromium(III) nitrate describes several inorganic compounds consisting of chromium, nitrate and varying amounts of water. Most common is the dark violet hydrated solid, but an anhydrous green form is also known. Chromium(III) nitrate compounds are of a limited importance commercially, finding some applications in the dyeing industry. It is common in academic laboratories for the synthesis of chromium coordination complexes.

Chemical formula:Cr(NO₃)₃ (anhydrous)

                            Cr(H₂O)₆](NO₃)₃•xH2O (nonahydrate)

Molar mass:238.011 g/mol (anhydrous);400.21 g/mol (nonahydrate)

Appearance:Blue-violet crystals (anhydrous);Purple crystals (nonahydrate)

Density:1.85 g/cm³ (nonahydrate)

Melting point:60.06 °C (140.11 °F; 333.21 K) nonahydrate

Boiling point:> 100 °C (212 °F; 373 K) (decomposes)

Solubility in water:81 g/100 mL (20 °C

Application

Chromium nitrate is used in the manufacture of alkali metal-free catalysts and in preservation. It is used in the preparation of chrome catalysts, in textile printing operations, and as a corrosion inhibitor. Chromium(III) nitrate as a source of chromium is added to food supplements for nutritional purposes .