An overview of the aluminum hydroxide (Aluminium hydroxide), chemical formula Al (OH) 3, aluminum hydroxide. A base, the acid and a significant, but also so called aluminate (H3AlO3), but the actual response is generated with a base bias aluminate, so it is usually considered as a partial hydrated aluminate (HAlO2 · H2O). Molecular formula: Al (OH) 3, Al2O3 · 3H2O or H3AlO3 Weight: 78. The relative density of 2.42, Mohs hardness of 3.0. It has a non-toxic, tasteless, good dispersion, low iron content of the characteristics of whiteness, referred to ATH. ATH thermal decomposition of dehydration, heat absorption is 1967.2J/KJ, can effectively inhibit heat and thermal degradation of the polymer. Thermal decomposition of aluminum hydroxide to release large amounts of combustible gas dilution steam, inhibit the spread of combustion, while the production of high temperature dense Al2O3 is formed on the surface of the polymer protective layer and the air barrier prevent further spread of flame. Al2O3 high temperature carbonization the polymer can promote the adsorption of solid particles, smoke generation suppressed. Second, the use of aluminum hydroxide flame retardants are one of the largest amount of non-polar world, with flame, smoke and anti-droplet triple effect, no secondary pollution when burned, no toxic and corrosive pyrolysis gas, heat and water vapor release, the polymer material having self-extinguishing flame properties. It not only has good dispersion properties, and can interact with magnesium hydroxide flame retardant synergist of play. Since aluminum hydroxide and less polar polymers such as polymer materials have good compatibility, therefore, access to a wider range of applications, usage is increasing year by year. Range: thermosets, thermoplastics, synthetic rubber, paints and building materials industries Third, the technical indicators are as follows: ≥ 99.5% silica, aluminum hydroxide ≤ 0.02% Loss on ignition ≤ 0.02% iron oxide ≥ 35% ≥ 95 Whiteness Value = 7.9% PH :325-8000 mesh particle surface modification silane