WHITENESS - 98% +/-2 SILICA SiO2 - 60 - 62% MAGNESIA MgO - 30 - 32% ALUMINA AI2O3 - 0.50 - 1.00% IRON Fe2O3 - 0.5 - 0.8% CALCIUM OXIDE CaO - 1.0 - 1.5% LOSS ON IGNITION - 2 - 3% BULK DENSITY (gm/ml) - 0.45 - 0.55% Ph - 8-9 MOISTURE - 0.4 - 0.6% SPECIFIC GRAVITY - 2.7 - 2.8% RETENTION ON 500 MESH - 0.3%
