| Melting point | 550 °C(lit.) |
| Boiling point | 1150 °C |
| density | 4.64 g/mL at 25 °C(lit.) |
| refractive index | 4.303 |
| form | powder |
| Specific Gravity | 4.64 |
| color | Dark gray to black |
| Water Solubility | Soluble in concentrated acids. Insoluble in water. |
| Merck | 14,713 |
| Stability: | Stable. Incompatible with acids (reacting to form poisonous hydrogen sulfide), moisture, water. |
| CAS DataBase Reference | 1345-04-6(CAS DataBase Reference) |
| IARC | 3 (Vol. 47) 1989 |
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