... used as fire retardant,filling, covering agents and retardants,pigments and retardant ,catalytic agent etc. Application1.Used as a fire retardant in the ... appliances, such as PVC,PP ,PE ,PS ,ABS,PU ,etc..2. Used as filling, covering agents and ... .5.Used as catalytic agent in organic synthesis.Specification of antimony trioxide:ItemSb2O399.80Sb2O399.50Sb2O399Sb2O398Chemical compositionSb2O3% (min)99. ...