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Cobalt nitrate is a salt of nitric acid formed from the cobalt cation and the nitrate anion.
C 2416 (OTTO) Cobalt(II) nitrate, hexahydrate, 98% Cas 10026-22-9 - used as a battery additive, in the manufacture of cobalt pigments and invisible inks, for decorating stoneware and porcelain, and in the preparation of catalysts.