Alumina is a white crystalline substance that resembles salt. Approximately 90% of all alumina is used for making aluminum, with the remainder used for abrasives and ceramics.
Vary according to the method of prepa-ration. White powder, balls, or lumps of variousmesh.Insoluble in water, dif-ficultly soluble in mineral acids and strong alkali.Noncombustible.
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