Cobalt(III) hydroxide
| Names | |
|---|---|
| IUPAC name
Cobalt(III) hydroxide
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| Other names
Cobaltic hydroxide
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| Identifiers | |
3D model (
JSmol ) |
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| ChemSpider | |
ECHA InfoCard
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100.013.776 |
| EC Number |
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PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| Co(OH)3 | |
| Molar mass | 109.95522 g |
| Appearance | brown-black or dark green powder |
| Hazards | |
| GHS labelling: | |
 
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| Danger | |
| H319, H334, H413 | |
| P261, P264, P273, P280, P285, P304+P341, P305+P351+P338, P337+P313, P342+P311, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Cobalt(III) hydroxide or cobaltic hydroxide is a
anions
OH−.
The compound is known in two structurally different forms, "brownish-black" and "green". The brownish-black form is a stable solid and can be prepared by reaction of water solutions of
The green form, formerly thought to be cobalt(II)
catalyst. It can be prepared by adding hydrogen peroxide to a solution of cobalt(II) chloride in 96% ethanol at –30 to –35°C, then adding a 15% solution of sodium carbonate in water with intense stirring. The resulting dark green powder is fairly stable at liquid nitrogen temperature, but at room temperature it turns dark brown within a few days.[2]
Natural occurrence
As of 2020, Cobalt(III) hydroxide is unknown among the known mineral species. However, heterogenite, CoO(OH), is known.[3][4]
See also
- Cobalt(II) hydroxide Co(OH)
2 - Cobalt(III) oxyhydroxide CoO(OH)
References
- ^ "Heterogenite".
- ^ "List of Minerals". 21 March 2011.