Aluminum oxide is a white odorless crystalline powder. Water insoluble. Properties (both physical and chemical) vary according to the method of preparation; different methods give different crystalline modifications. The variety formed at very high temperature is quite inert chemically.
Formula – Al2O3
Molar mass – 101.96 g/mol
CAS Number – 1344-28-1
Density – 4.000 g/cm3
Appearance – Pellets 3mm
Initial boiling point and boiling range – 2,980°C (5,396°F)
Vapour pressure – 1 hPa (1 mmHg) at 2,158°C (3,916°F)
Water solubility – Insoluble
Melting point/freezing point – 2,040°C (3,704°F) – lit.