Milled high purity alumina AHP410 Typical Properties Na (ppm) 40 Fe (ppm) 10 Si (ppm) 170 Ca (ppm) 20 Mg (ppm) 20 Al2O3 (%) 99.97 Particle Size (μm) 6.1 BET (m2/g) 0.9 Bulk Density ( Loose ) (g/cm3) -