Main use: Antimony trioxide is one of the earliest flame retardants, suitable for materials such as epoxy resin, polyurethane, polystyrene, polyvinyl chloride (PVC), etc. When used alone, the flame retardant effect is poor, but when combined with halogen compounds, the flame retardant effect is significantly improved.

Pigments and coatings: Antimony trioxide can be used as a white pigment and flame retardant, widely used in paints and plastics. It is a good covering agent used in the manufacture of white paint and plastic.

Glass and ceramic industry: In the glass industry, antimony trioxide is used as a decolorizing agent to replace arsenic acid. It is used as a covering agent in enamel and ceramic products.

Medicine and Metallurgy: Antimony trioxide is used in the manufacture of drugs and mordants, and also has applications in metallurgy and military industry.

Catalyst: It is also used as a condensation catalyst, for example, in the condensation process of ethylene terephthalate, the dosage is about 0.03%.