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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
As a flame retardant in plastics, textiles, and coatings, and in the manufacturing of ceramic enamels and glass.
Antimony trioxide is an inorganic compound appearing as a white crystalline powder. It serves multiple industrial purposes, including: Flame Retardant Synergist: Enhances the effectiveness of halogenated flame retardants in materials like plastics, textiles, and coatings. Opacifying Agent: Used in glasses, ceramics, and enamels to impart opacity. Catalyst: Facilitates the production of polyethylene terephthalate (PET) and aids in the vulcanization of rubber.
When combined with halogenated flame retardants, antimony trioxide promotes the formation of less flammable chars, thereby enhancing the material's resistance to combustion.
While antimony trioxide itself is not a flame retardant, it acts as a synergist, enhancing the effectiveness of halogenated flame retardants. This combination is widely used due to its cost-effectiveness and efficiency in reducing flammability.
In the production of PET plastics, antimony trioxide acts as a catalyst, accelerating the polymerization process and improving production efficiency.
Antimony trioxide can migrate into air and dust from products containing it, leading to potential environmental contamination. Proper handling and disposal practices are essential to mitigate environmental impact.
Engineering Controls: Implement adequate ventilation systems to limit airborne concentrations. Personal Protective Equipment (PPE): Utilize appropriate respiratory protection, gloves, and protective clothing. Hygiene Practices: Ensure proper washing facilities and discourage eating or drinking in areas where antimony trioxide is handled.
Carcinogenic Potential: Classified as "reasonably anticipated to be a human carcinogen" by the National Toxicology Program. Occupational Exposure: Inhalation can lead to respiratory issues; thus, a Threshold Limit Value (TLV) of 0.5 mg/m³ has been established for workplace air.
Yes export ready with ATO COA, msds, tds documents provided on sourcing with appropriate lead time.
Yes, you can purchase Antimony Trioxide in bulk quantities in USA.
