| Chemistry name: | cobalt hydroxide; cobalt hydrate |
| M Formula: | Co(OH)2 |
| Properties: | |
| Rose-red powder. D 3.597. Soluble in acids and ammonium salt solutions; insoluble in water and alkalies. | |
| Derivation: | |
| Addition of sodium hydroxide to a solution of cobaltous salt. | |
| Use: | |
| Cobalt salts, paint and varnish driers, catalyst, storage-battery electrodes. | |