Super fine grade aluminium hydroxide is used as fire retardant.Super fine particle size endows the final products with better electric attribute. ITEM Al(OH)3 % SiO2 % Fe2O3 % Na2O % Oil absorption ml/100g D50 Micron Moisture % X3 99.6 0.04 0.03 0.3 34-38 2.5-3.5 0.4 X2 99.6 0.04 0.03 0.3 35-40 1.5-2 0.4 X1 99.6 0.04 0.03 0.3 37-44 0.9-1.3 0.4