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Cobalt(II) Hydroxide or Cobaltous Hydroxide is a highly water insoluble crystalline Cobalt source. It is a inorganic compound with the formula Co(OH)2, consisting of divalent cobalt cations Co2+and hydroxide anions HO−. Cobaltous hydroxide appears as rose-red powder, is soluble in acids and ammonium salt solutions, insoluble in water and alkalies.
Cobalt(II) Hydroxide
Synonym | Cobaltous hydroxide, cobalt hydroxide, β-cobalt(II) hydroxide |
Cas No. | 21041-93-0 |
Chemical formula | Co(OH)2 |
Molar mass | 92.948g/mol |
Appearance | rose-red powder or bluish-green powder |
Density | 3.597g/cm3 |
Melting point | 168°C(334°F;441K)(decomposes) |
Solubility in water | 3.20mg/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 |
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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