Melting Point 2375 °C
Boiling Point 100°C (water)
Water Solubility Soluble in hot sulfuric acid, and aquaregia. Insoluble in water, concentrated sulfuric acid and dilute acid.
Density 5.06 g/mL at 25 °C(lit.)
Storage Temp 15-25°C
Flash Point -
Stability Stable. Incompatible with oxidizing agents, acids.
Appearance Gray to dark gray or black powder
Refractive Index 4.7739