Melting Point 886 °C(lit.)
 Boiling Point 1470 °C
 Water Solubility Soluble in concentrated alkali, hydrochloric acid, and ammonium chloride. Insoluble in water, dilute alkali and alcohol.
 Density 3500-3700kg/m3
 Storage Temp Store below +30°C.
 Flash Point -
 Stability Stable. Reacts violently with hydrogen peroxide, strong oxidizing agents, aluminium, zirconium, halogens, sulphur trioxide, boron, silicon, sodium, zinc.
 Appearance yellow powder
 Refractive Index 2.67