Definition and Areas of Use :
Cobalt (II) sulfate heptahydrate is seen as red monoclinic crystals that liquefy and become anhydrous at around 100 ° C at 250 ° C. It is soluble in water, slightly soluble in ethanol and especially soluble in methanol. Salts are paramagnetic.
It is formed by the reaction of metallic cobalt, oxide, hydroxide or carbonate with aqueous sulfuric acid
In many cases, cobalt is obtained from ores by sulfate.
Hydrated cobalt (II) sulfate is used in the preparation of pigments and in the manufacture of other cobalt salts. Cobalt pigment is used in porcelain and glass. Cobalt (II) sulfate is used in accumulators, electroplating baths, sympathetic inks and as an additive to soils and animal feeds. For this purpose, cobalt sulfate is produced by treating cobalt oxide with sulfuric acid.