Melting Point 1640 °C
 Boiling Point 2300 °C
 Water Solubility Practically insoluble in, but slowly hydrolyzed by water
 Density 6.16 g/mL at 25 °C(lit.)
 Storage Temp Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
 Flash Point 2300°C
 Stability Stable under normal temperatures and pressures.
 Appearance white to off-white Powder
 Refractive Index -