Aluminum Hydroxide Molecular formula: ALú¿OHú¬3 or AL2O3•3H2O Molecular weight: 78 1)Technical Index Chemical composition, % AL2O3 not less than Firing loss not less than Impurity not larger than SiO2 Fe2O3 NA2O AH-1 64.5 35 0.02 0.02 0.4 AH-2 64.0 35 0.04 0.03 0.5 AH-3 63.5 35 0.08 0.05 0.6 Note : 1. AL2O3 content is of the difference of 100% minus firing loss and impurity content. 2. The chemical composition is calculated of the baking at 110í+5íµ for 2 hour . 3. The impurity content is treated in line with the number rule of GB8170. Physical feature: there are mainly 4 sizes of aluminum hydroxide, 325, 800, 2,000 and 3,000 mesh. 2)Application Aluminum hydroxide is the most consumable and applicable inorganic additive flame retardant that does not only resist firing, but also prevents from smoke, dropping or toxic gas. So, it is widely used with gradual increase of the usage, at the sectors of hot solidifying and moulding plastic, synthetic rubber, coating and construction materials. internal plastic with knitted exterior covered with film, with the net weight of 25kg or 40kg