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We are one of the leading manufacturers, distributors, and suppliers of Antimony Trioxide in USA. Its CAS Number is 1309-64-4, and the chemical formula is O3Sb2.
Antimony Trioxide, with the chemical formula (Sb₂O₃), is a fine white crystalline powder widely recognized for its flame-retardant properties and catalytic activity in industrial applications. It is primarily used as a flame retardant synergist, catalyst, and opacifier across various U.S. manufacturing industries, including plastics, coatings, textiles, and glass production. Antimony Trioxide is also known as Diantimony Trioxide and Antimonious Oxide, terms often used by ATO manufacturers and Antimony Trioxide suppliers. We are one of the largest Antimony Trioxide manufacturers and suppliers in the USA Scimplify offers high-purity (≥99%) industrial and flame-retardant grades of ATO that meet TSCA (EPA) and NSF/ANSI standards. Scimplify is a trusted Antimony Trioxide supplier serving U.S. manufacturers, with consistent lead times and competitive USD pricing for their bulk ATO requirements. Contact us for bulk Antimony Trioxide. For detailed handling, storage, and emergency information, please refer to our antimony trioxide SDS or MSDS in the document section.
Antimony Trioxide, with the chemical formula (Sb₂O₃), is a fine white crystalline powder widely recognized for its flame-retardant properties and catalytic activity in industrial applications. It is primarily used as a flame retardant synergist, catalyst, and opacifier across various U.S. manufacturing industries, including plastics, coatings, textiles, and glass production. Antimony Trioxide is also known as Diantimony Trioxide and Antimonious Oxide, terms often used by ATO manufacturers and Antimony Trioxide suppliers. We are one of the largest Antimony Trioxide manufacturers and suppliers in the USA Scimplify offers high-purity (≥99%) industrial and flame-retardant grades of ATO that meet...
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Flame Retardants
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Synergists & Smoke Suppressants
Antimony-based synergists
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Chemical Properties & Specifications
H302, H315, H319, H335
P264, P270, P301 + P312, P305 + P351 + P338
Category 2, 2A, 3, 4
13 - Non-combustible solids
Harmful by ingestion, may cause respiratory irritation, skin, and eye irritation
WGK 2 (Class 2: hazardous to water)
Antimony trioxide is a key flame retardant synergist in polymers such as PVC, polyethylene (PE), and polypropylene (PP). It is also found in rubber compounds used in the U.S. automotive, electrical, and construction sectors. It enables materials to meet U.S. fire safety standards like UL-94 by forming protective char layers during combustion.
Antimony trioxide enhances the fire resistance and thermal stability of finished products. It is used in protective coatings for industrial infrastructure, specialty paints, and high-performance adhesives to meet fire safety and durability requirements.
Antimony trioxide helps produce flame-resistant fabrics and upholstery for safety apparel, furnishings, and industrial environments in the U.S. Its synergistic action with halogenated flame retardants ensures compliance with fire regulations.
Antimony trioxide is used as a fining agent and opacifier. It helps to remove gas bubbles and increase clarity, as well as imparting opacity in ceramics and enamels. U.S.manufacturers use it for high-quality decorative, optical, and architectural glass products.
20–25°C (68–77°F)
Keep in a cool, dry place away from light and moisture
Use airtight containers to prevent contamination
Packaged 50-kilogram HDPE bags
Each pallet is stretch-wrapped in polyethylene to ensure the bags remain secure during transit
Alternative package: 500-kilogram big bags