Cobalt oxide extra pure

Cobalt oxide extra pure is a high-purity grade of cobalt(II,III) oxide (Co₃O₄), typically with min. 70% Co content, supplied as a black odorless powder for laboratory, catalytic, and pigment applications.​

Identity and Composition

Chemical name: Cobalt(II,III) oxide; cobaltosic oxide.​

Molecular formula: Co₃O₄; molecular weight 240.80 g/mol.​

Grade specifications: Co (by complexometry) min. 70%, Pb max. 0.002%, Ni max. 0.3%, Fe max. 0.1%; spinel structure.​

Physical Properties

Appearance: Black powder.​

Density: 6.11 g/cm³.​

Melting point: 895 °C.​

Solubility: Insoluble in water; soluble in acids.​

Typical Uses

Extra pure cobalt oxide serves as a catalyst, p-type semiconductor, pigment in ceramics/glazes (blue colors), and precursor in battery materials and electrochemistry.​

Handling and Safety

Hazardous (H301, H317, H330, H334, H350i); toxic if swallowed/inhaled, skin/respiratory sensitizer, possible carcinogen, aquatic toxin. Store sealed; use PPE.​

For catalog purposes: “Cobalt oxide extra pure, Co₃O₄ (Co min. 70%), black powder, mp 895 °C, insoluble in water, for catalysts/pigments; highly toxic sensitizer.”​