Cobalt chloride extra pure

Cobalt chloride extra pure is a high-purity grade of cobalt(II) chloride hexahydrate (CoCl₂·6H₂O), typically ≥97–99% assay, appearing as red to pink deliquescent crystalline solid widely used in chemical laboratories, electroplating, pigments, and humidity indicators.​

Identity and Composition

Chemical name: Cobalt(II) chloride hexahydrate.​

Molecular formula: CoCl₂·6H₂O; molecular weight 237.93 g/mol.​

Grade specifications: Assay 97–99%, with low chloride and heavy metal impurities; hygroscopic with stable crystalline form.​

Physical Properties

Appearance: Red to pink deliquescent crystals or powder.​

Odor: Odorless.​

Density: Approximately 1.92 g/cm³.​

Melting point: About 86 °C (heptahydrate); boiling point ~110 °C.​

Solubility: Highly soluble in water and alcohol, forming pink to blue solutions depending on hydration.​

Typical Uses

Extra pure cobalt chloride is used as a reagent in chemical analysis, humidity indicator in desiccators, manufacturing pigments, catalysts, and in electroplating baths.​

Handling and Safety

Hygroscopic; store sealed and dry. It is harmful if swallowed and inhaled, may cause skin/respiratory sensitization, suspected carcinogen and reproductive toxin. Use PPE and avoid environmental release.​

For catalog purposes: “Cobalt chloride extra pure, CoCl₂·6H₂O ≥97%, red deliquescent crystals, mp 86 °C, highly water-soluble, chemical reagent/humidity indicator; toxic sensitizer.”​