... 2. also used as oxidizer, oil paint, etc.... cobalt oxidePurity: 72%Place of Origin:ChinaCAS No. 1307- ... 96-6Features: Cobalt oxide is black and grey powder, no smell ... also could be used as oxidizer, oil paint and cobalt catalyzers. Specification: Co:72%minNi: 0.5%maxFe ... glass, ceramic, porcelain enamel, magnetic material, cobalt activator, nutrient for domestic animals ...