The aim of this work was to synthesis aluminum trihydrate from kaolin through alkali dissolution route. Thermogravimetric analysis showed that the material had good thermal stability and can withstand temperatures up to 206˚C without any physical deterioration. X ray diffraction confirmed that synthesized aluminum trihydrate had monoclinic structure and scanning electron microscopy indicated that the product had a particle size range between 10 to12 μm. Aluminum tridhydrate has a unique fire retardation mechanism. When it is heated, it decomposes endothermically in to Al2O3 and H2O, the oxide layer forming a protective barrier which prevents the fire from penetrating into the surface and cause further burning, and H2O in the form of vapor suppresses the toxic smoke produced.