... used as polyester catalytic in the synthetic fiber industry, catalytic agent in organic synthesis. Specification:ItemSb2O399.80Sb2O399.85Sb2O399.9Chemical compositionSb2O3%( ... -0.60.3-0.5Application:1. Mainly used as polyester catalytic in the synthetic fiber industry. It is the product with ... rubber, ceramics, enamels, fabrics and fiber products.4.Used as catalytic agent in organic synthesis.