Cobalt (II) Nitrate Hexahydrate
Cobalt (II) Nitrate Hexahydrate is the inorganic cobalt salt of nitric acid which has the chemical formula Co(NO3)2 ∙ 6H2O. This salt is soluble in water and other polar solvents. It is produced by treating metallic cobalt or one of its oxides, hydroxides, or carbonate with nitric acid:
Co + 4HNO3 + 4H2O --> Co(H2O)6(NO3)2 + 2NO2
CoO + 2HNO3 + 5H2O --> Co(H2O)6(NO3)2
CoCO3 + 2HNO3 + 5H2O --> Co(H2O)6(NO3)2 + CO2
Cobalt (II) nitrate hexahydrate is used in the preparation metallic cobalt based dyes and pigments. It is also a precursor for the preparation of catalyst for use in certain organic reactions. It finds use in catalysis, vitamin preparations, and porcelain decorations.