Cobalt nitrate extra pure

Cobalt nitrate extra pure is a high-purity form of cobalt(II) nitrate hexahydrate (Co(NO₃)₂·6H₂O), typically ≥97–99% assay, appearing as red to pinkish-red hygroscopic crystals used in analytical chemistry, catalysts, and material synthesis.​

Identity and Composition

Chemical name: Cobalt(II) nitrate hexahydrate.​

Molecular formula: Co(NO₃)₂·6H₂O; molecular weight 291.03 g/mol.​

Grade specifications: Assay 97–99%, low impurities (e.g., Cl ≤0.01%, SO₄ ≤0.02%, heavy metals ≤0.002%).​

Physical Properties

Appearance: Red crystalline solid, odorless.​

Density: 1.88–2.49 g/cm³.​

Melting point: 55 °C (loses water); boiling point ~74 °C.​

Solubility: Highly soluble in water (134 g/100 mL), ethanol, acetone; pH ~4 (10% solution).​

Typical Uses

Extra pure cobalt nitrate acts as a reagent and cobalt source in nanoparticle synthesis, electroplating, pigments, fertilizers, and laboratory analysis.​

Handling and Safety

Strong oxidizer (H272); harmful if swallowed (H302), skin sensitizer (H317), causes serious eye damage (H318), respiratory sensitizer (H334), suspected carcinogen/mutagen/reprotoxin (H341, H350i, H360), aquatic toxin (H410). Store sealed away from combustibles; use PPE.​

For catalog purposes: “Cobalt nitrate extra pure, Co(NO₃)₂·6H₂O ≥97%, red hygroscopic crystals, mp 55 °C, highly water-soluble, reagent/catalyst; strong oxidizer, toxic sensitizer.”​