Cobalt Sulphate
| PROPERTIES & USAGE | ||
| Properties | Usage | |
| Chemical formula | CoSO4 | preparation of pigments |
| Boiling point | 420 °C (788 °F; 693 K) (heptahydrate) | in porcelains and glass. |
| Density | 3.71 g/cm3 (anhydrous) | additive |
| 3.075 g/cm3 (monohydrate) | ||
| 2.019 g/cm3 (hexahydrate) | ||
| 1.948 g/cm3 (heptahydrate) | ||
| Melting point | 735 °C (1,355 °F; 1,008 K) (anhydrous) | |
| 96.8 °C (heptahydrate) | ||
| Molar mass | 154.996 g/mol (anhydrous) | |
| 173.01 g/mol (monohydrate) | ||
| 263.08 g/mol (hexahydrate) | ||
| 281.103 g/mol (heptahydrate) | ||
| SPECIFICATION | |||
| Specification | |||
| Co: | : | 21%min. | 33% min |
| Ni: | : | 0.002% max. | |
| Fe: | : | 0.002% max. | |
| Ca: | : | 0.002% max. | |
| Mg: | : | 0.002% max. | |
| Cu: | : | 0.002% max. | |
| Mn: | : | 0.002% max. | |
| Zn: | : | 0.002% max. | |
| Pb: | : | 0.002% max. | 0.005 max |
| Na: | : | 0.002% max. | |
| As | : | 0.0005 max | |
| Cd | : | 0.002 max | |
| Hg | : | 0.005 max | |