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ALUMINUM OXIDE, 96% pure, gray/brown, 500 grit, (Alumina), Al2O3
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.
Insoluble (NIOSH, 2016)
5396 °F at 760 mm Hg (NIOSH, 2016)
3632 °F (NIOSH, 2016)
4 (NIOSH, 2016)