Cobalt(II) Hydroxide
| Synonym | Cobaltous hydroxide, cobalt hydroxide, β-cobalt(II) hydroxide |
| Cas No. | 21041-93-0 |
| Chemical formula | Co(OH)2 |
| Molar mass | 92.948 g/mol |
| Appearance | rose-red powder or bluish-green powder |
| Density | 3.597 g/cm3 |
| Melting point | 168 °C (334 °F; 441 K) (decomposes) |
| Solubility in water | 3.20 mg/L |
| Solubility product (Ksp) | 1.0×10−15 |
| Solubility | soluble in acids, ammonia; insoluble in dilute alkalis |
Cobalt(II) Hydroxide Enterprise's Specification
| Chemical Index | Min./Max. | Unit | Standard | Typical |
| Co | ≥ | % | 61 | 62.2 |
| Ni | ≤ | % | 0.005 | 0.004 |
| Fe | ≤ | % | 0.005 | 0.004 |
| Cu | ≤ | % | 0.005 | 0.004 |
| Zn | ≤ | % | 0.005 | 0.004 |
| Mn | ≤ | % | 0.005 | 0.004 |
| Mg | ≤ | % | 0.005 | 0.004 |
| Ca | ≤ | % | 0.005 | 0.004 |
| Cd | ≤ | % | 0.005 | 0.004 |
| Pb | ≤ | % | 0.005 | 0.004 |
| SO₄²¯ | ≤ | % | 0.005 | 0.003 |
| NO₃﹣ | ≤ | % | 0.005 | 0.001 |
Package: 25/50 kgs fibre board drum or iron drum with plastic bags inside.
What is Cobalt(II) Hydroxide used for?
Cobalt(II) Hydroxide is most used as a drier for paints and varnishes and is added to lithographic printing inks to enhance their drying properties. In the preparation of other cobalt compounds and salts, it is used as a catalyst and in the manufacture of battery electrodes.
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