Alumina Al2O3 patent, molecular weight 101.96. The main components of alumina. White powder. With different crystal, common is alpha Al2O3, and gamma-Al2O3. The nature of corundum for alpha Al2O3, the six parties close packing crystal, alpha Al2O3 the melting point of 2015 + 15 ℃, density of 3.965 g/cm3, hardness is 8.8, insoluble in water, acid or alkali. Gamma-irradiation Al2O3 of cubic close packing crystal, insoluble in water, but soluble in acid and alkali.

Analytics reagents. Organic solvent dehydration. Adsorbent. Organic reactions catalysts. Abrasive. Polish.