Cobalt acetate extra pure

Cobalt acetate extra pure is a high-purity form of cobalt(II) acetate tetrahydrate (Co(CH₃COO)₂·4H₂O), typically ≥98.5% assay, supplied as a reddish-pink crystalline powder soluble in water and alcohol for use in catalysis, pigments, and synthesis.​

Identity and Composition

Chemical name: Cobalt(II) acetate tetrahydrate.​

Molecular formula: C₄H₆O₄Co·4H₂O; molecular weight 249.08 g/mol.​

Grade specifications: Assay min. 98.5–99%, low impurities (e.g., Fe ≤0.01%, SO₄ ≤0.01%, Cl ≤0.005%, Pb ≤0.001%, Ni ≤0.1%).​

Physical Properties

Appearance: Reddish-pink crystalline powder.​

Odor: Acetic acid odor.​

Density: 1.71 g/cm³.​

Melting point: 140–298 °C; pH 6.8 (0.2 M aqueous solution).​

Solubility: Soluble in water and ethanol.​

Typical Uses

Extra pure cobalt acetate serves as a catalyst precursor in oxidation reactions (e.g., autoxidation), in electroplating, pigments/ceramics, and as a cobalt source in materials synthesis.​

Handling and Safety

Hygroscopic; store sealed in dry conditions. Harmful if swallowed (H302), skin/respiratory sensitizer (H317/H334), suspected mutagen/carcinogen/reprotoxin (H341/H350i/H360F), very toxic to aquatic life (H410). Use PPE.​

For catalog purposes: “Cobalt acetate extra pure, Co(CH₃COO)₂·4H₂O ≥98.5%, reddish-pink crystals, density 1.71 g/cm³, water-soluble, catalyst/pigment precursor; toxic sensitizer.”​