Basic information:1.Molecular formula: Co 2.Molecular weight: 58.93 3.CAS No.: 7440-48-4 4.Purity: 99.6%min 5.Storage: It should be stored in a cool,ventilated, dry and clean warehouse. Cobalt metal powder : Hard and malleable. Gradually soluble in dilute hydrochloric acid and sulfuric acid, soluble in nitric acid.