Cobalt (II) Chloride CoCl2 Cobalt Chloride - 100g

Cobalt(II) Chloride

Other Names: Cobalt dichloride, Cobaltous chloride
CAS Number: 7646-79-9
EC Number: 231-589-4
Sum Formula: CoCl₂
Molar Mass: 129.84 g/mol
Appearance: Blue crystalline solid (anhydrous) or pink crystalline solid (hexahydrate)

Chemical and Physical Properties

• Density: 3.36 g/cm³ (anhydrous); ~1.92 g/cm³ (hexahydrate)

• Melting Point: 735°C (anhydrous)

• Boiling Point: 1049°C (anhydrous)

• Solubility in Water: Highly soluble (76 g/100 mL at 20°C)

• Solubility in Other Solvents: Soluble in ethanol, methanol, acetone

• Odor: Odorless

• Color Change: Pink (hydrated) to blue (anhydrous) upon drying

Applications

• Humidity Indicators: Used in moisture indicators due to its reversible color change between hydrated (pink) and anhydrous (blue) forms.

• Catalysis: Acts as a catalyst in various chemical reactions, including organic synthesis.

• Electroplating: Used in cobalt electroplating baths for surface finishing.

• Pigment Production: Used in ceramic and glass industries to impart blue coloration.

• Laboratory Use: Serves as a source of cobalt ions in analytical chemistry and chemical synthesis.

Safety

Signal Word: Danger

Hazard Statements

• H302: Harmful if swallowed

• H315: Causes skin irritation

• H317: May cause an allergic skin reaction

• H319: Causes serious eye irritation

• H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled

• H341: Suspected of causing genetic defects

• H350i: May cause cancer by inhalation

• H410: Very toxic to aquatic life with long-lasting effects

Precautionary Statements

• P273 - P280 - P301 + P312 - P302 + P352 - P305 + P351 + P338 - P308 + P313 

Handling and Storage

• Storage Conditions: Store in a cool, dry, well-ventilated area away from incompatible substances such as oxidizers and strong acids.

• Handling Precautions: Avoid formation of dust. Use appropriate personal protective equipment. Ensure adequate ventilation.