Synonyms: Cobaltous(II) oxide Purity Limit: 77.5-79.8% (Assay, Cobalt content) CAS No.: 1307-96-6 Molecular Formula: CoO Molecular Weight: 74.93 MDL No.: MFCD00016031 Appearance: Fine black to brownish grey powder Mesh Size: 200 mesh Storage Temperature: Store at RT