... foil bag, and triple layer paper bag, 25kgs/bag. High purity Alumina Exclusive for Saphire Production Product Name: Alumina; Molecular Formula: Al2O3 ... AppearanceProduct NameAl2O3 content, %Original Diameter, nmD50, μmGranulation Particle Size, μmBulk Density, g/cm3Specific Surface Area, BET m2/gCH4N-11BWhite Powderα- Al2O399 ...