... %Al2O3≥93≥93≥92≥90≥93≥90Na2O≤0.3≤0.3≤0.50.15-0.3≤0.3I.L6-86-8≤8≤≤56-8 Bulk ... density,g/ml0.68-0.720.70-0.750.65-0.750.68-0.780.70-0.800.68-0.72 Surface area,m2/g ... ,ml/g0.3-0.450.3-0.420.4-0.460.3-0.50.40.3-0.5 Static absorption,%Water15-17Fluorine 0.12Water50Chlorine10-20Water50-70Water17 ... -19 Activity,%--56-62--- Loss on abrasion,%≤1.0≤1.0≤1.0≤0.7≤0.4≤0.8Crushing strength, N/grainΦ1-2≥40≥40 ...