... Al2O3≥93≥93≥92≥90≥93≥90Na2O≤0.3≤0.3≤0.5 0.15-0.3≤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/ ... 0.5 Static absorption,Water15-17Fluorin0.12Water50Chlorine10-20Water50-70 Water 17-19 Activity,--56-62--- Loss on abrasion,≤1.0≤1.0≤1.0≤0.7≤0 ... .4≤0.8Crushing strength, N/grainΦ1-2≥40≥40 ...