Catalyst Antimony Trioxide Product Description: Catalytic antimony trioxide is made from high quality refined antimony by our unique iso-ion refining technique. Its characteristic are: fine size,high whiteness, few impurities, pure crystal pattern, high activity ,easy to disperse. Application:Mainly used as polyester catalytic in the synthetic fiber industry .It is the product with high solubility in ethylene glycol and this allows the product to be introduced into the PET reactor as a solution or suspension instead of in powder form.