Chromium(II)_sulfate
Chromium(II) sulfate
Chemical compound
Chromium(II) sulfate is an inorganic compound with the chemical formula CrSO4. It often comes as hydrates CrSO4·nH2O. Several hydrated salts are known. The pentahydrate CrSO4·5H2O is a blue solid that dissolves readily in water. Solutions of chromium(II) are easily oxidized by air to Cr(III) species. Solutions of Cr(II) are used as specialized reducing agents of value in organic synthesis.[1]
The salt is produced by treating chromium metal with aqueous sulfuric acid:[2]
- Cr + H2SO4 + 5 H2O → CrSO4·5H2O + H2
It can be produced through the reaction of sulfate salts and chromium(II) acetate[3] or, for in situ use, the reduction of chromium(III) sulfate with zinc.[1]