Cobalt Hydroxide is a rose red monoclinic or tetragonal crystal, insoluble in water, slightly amphoteric, difficult to dissolve in strong alkali, but soluble in acid and ammonium salt solution.Mainly used as a coloring agent for glass and enamel, as a raw material for other cobalt compounds, and as a desiccant for varnishes and coatings. Formula: Co(OH)2 CAS No.: 21041-93-0 M.W.: 92.94 Properties: It is a kind of light pink powder, specific gravity 3.597, soluble in acid and ammonium salt solution, insoluble in water and alkali. It reacts with organic acids to form cobalt soap. pecification(%): Assay (Co) 62% Fe 0.003max Ni 0.003max Zn 0.003max Mn 0.003max Cu 0.003max Pb 0.003max