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Cobalt sulphate is any of the inorganic compounds with the formula CoSO4(H2O)x. Usually cobalt sulfate refers to the hydrate CoSO4.7H2O, which is one of the most commonly available salts of cobalt.
C 2437 (OTTO) Cobalt sulphate, GR 99%+ Cas 10026-24-1 - used in storage batteries and electroplating baths, sympathetic inks, and as an additive to soils.