Antimony Trioxide
ELRASATM – ATOx
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Antimony Trioxide is a white, crystalline powder primarily used as a flame retardant synergist in plastics, rubber, textiles, and electronics. It enhances the flame-retardant properties of materials…
CAS Number
1309-64-4
HS Code
28.25.80.00
INCI Name
Antimony Trioxide
Molecular Formula
Sb₂O₃
Antimony Trioxide
ELRASATM – ATOx
Antimony Trioxide is a white, crystalline powder primarily used as a flame retardant synergist in plastics, rubber, textiles, and electronics. It enhances the flame-retardant properties of materials by promoting char formation and reducing smoke production. Additionally, it…
CAS Number
1309-64-4
INCI Name
Antimony Trioxide
HS Code
28.25.80.00
Molecular Formula
Sb₂O₃
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Product Specification
Physical Properties
| Property | Specification |
|---|---|
| Appearance | White crystalline solid |
| Odor | Odorless |
| Molecular Weight (G/Mol) | 291.52 |
| Density Or Specific Gravity | 5.2 at 77 °F |
| Refractive Index | 1.5144 at 589 nm |
| Density | 5.2 at 77 °F |
Chemical Properties
| Property | Specification |
|---|---|
| Water Solubility | 0.0033 g/l at 22.2 °C |
| Hazardous Reactions | Hazardous decomposition products formed under fire conditions |
Thermal Properties
| Property | Specification |
|---|---|
| Melting Point | 1211 °F |
| Boiling Point | 2822 °F at 760 mmHg (sublimes); 1598 °F at 210 mmHg |
| Flash Point | Not flammable |
Processing Methods & Reference Formulations
A. Paints
Add Sb₂O₃ during the pigment dispersion or mill base phase to ensure even particle distribution and avoid agglomeration. Sb₂O₃ is sensitive to moisture, which can reduce its flame-retardant effectiveness and cause clumping. Store in dry conditions and avoid water-based systems unless surface-treated grades are used.
| Key Ingredients | Indicative Dosage (% w/w) |
|---|---|
| Polymer binder (e.g., PVC, epoxy) | 85% |
| Halogenated additive (plasticiser) | 5% |
| Antimony Trioxide | 1% |
| Divalent metal stannate (e.g., zinc stannate) | 4% |
| Aluminium Trihydroxide (smoke suppressant) | 4% |
| Pigments & fillers | 1% |
| Additives, stabilisers, etc. | — |
B. Textile
To ensure good adhesion to fibers, disperse Sb₂O₃ thoroughly in the polymer binder, like acrylic, PU, or EVA emulsions, before applying it to textiles. Maintain even distribution and avoid agglomeration to ensure consistent flame-retardant performance.
| Key Ingredients | Indicative Dosage (% w/w) |
|---|---|
| Water | ~68% |
| Brominated flame retardant | 16% |
| Antimony Trioxide | 5% |
| Dispersion agent | 1% |
| Thickener | 1% |
| Wetting agent | 1% |
| Coating resin | 8% |
C. Glass
Introduce Sb₂O₃ in the melting phase along with other raw materials to ensure thorough incorporation and proper fining during high-temperature processing. Sb₂O₃ can act as an oxidizing agent, so balance it with other redox-sensitive ingredients.
| Key Ingredients | Indicative Dosage (% w/w) |
|---|---|
| Silicon Dioxide | 64% |
| Boron Trioxide | 8.3% |
| Aluminum Oxide | 4% |
| Sodium Oxide | 6.5% |
| Potassium Oxide | 7% |
| Zinc Oxide | 5.5% |
| Titanium Dioxide | 4% |
| Antimony Trioxide | 0.6% |
| Chloride (as Chloride Ion or Source Compound) | 0.1% |
Dosing Guidelines
A. Dosing by Application
| Products | Authorized dosage |
|---|---|
| Flame retardants (plastics, etc.) | 2-10% |
| Pigment/additive (glass, ceramics) | <1% |
About Antimony Trioxide
Antimony Trioxide manufacturers and distributors supply this essential flame-retardant synergist to industries requiring high performance and safety. As a trusted supplier, we ensure consistent purity, optimized particle size, and strong stability suitable for manufacturing applications.
Our Antimony Trioxide is widely preferred for its effectiveness in flame-retardant systems, catalytic capabilities, and opacity enhancement in ceramics and coatings. Built on quality, reliability, and global sourcing strength, we ensure seamless supply chain support across all industries.
Features of Antimony Trioxide
- Highly Effective Flame Retardant Synergist enhancing smoke suppression.
- High-Purity Product suitable for plastics, textiles, and electronics.
- Versatile Industrial Use in PET, glass, ceramics, and coatings.
- Consistent Quality & Particle Size for reliable performance.
- Global Supply Chain ensuring availability and timely delivery.
Why Source Antimony Trioxide Through Elchemy?
- Verified Antimony Trioxide Manufacturer Network: Every Sb₂O₃ producer in the Elchemy network is pre-audited for purity, particle size, and export compliance before onboarding. You deal with one accountable partner for industrial and high-purity grades, and we manage supplier risk.
- Bulk Supply with Transparent Per-Ton Pricing: Source antimony trioxide (CAS 1309-64-4) from samples up to bulk bags and container loads, priced per kg or per ton and scaled to your volume, with a binding quote within 24 business hours.
- High-Purity 99.5% / 99.9% Grades, Fully Documented: Standard industrial grade plus high-purity 99.5% and 99.9% material for electronics, catalyst, and fine-particle flame-retardant use — every order ships with COA, TDS, and a GHS-compliant SDS, with REACH documentation on request.
- Flame-Retardant & PET-Catalyst Ready: Material suited to use as a flame-retardant synergist with halogenated systems and as a PET polymerisation catalyst, with consistent particle-size specification batch to batch.
- Samples Dispatched in 24–48 Hours: Verify purity and particle size before bulk commitment. COA-backed samples are dispatched within 24–48 hours of confirmation.
- 40+ Country Reach Including US-Based Buyers: Elchemy delivers worldwide with quoted lead times, compliant hazard handling, and full export and import documentation for your destination market.
- Effective Flame Retardant Synergist: Enhances flame retardancy and reduces smoke production in various materials.
- High Purity Standards: Ensures optimal performance in plastics, textiles, and electronics.
- Versatile Applications: Used in PET production, glass, ceramics, and as a colorant in paints and coatings.
- Eco-Friendly Production: Committed to sustainable manufacturing practices.
- Reliable Supply Chain: Ensures consistent availability and quality for global markets.
About Antimony Trioxide
Antimony Trioxide manufacturers and distributors supply this essential flame-retardant synergist to industries requiring high performance and safety. As a trusted supplier, we ensure consistent purity, optimized particle size, and strong stability suitable for manufacturing applications.
Our Antimony Trioxide is widely preferred for its effectiveness in flame-retardant systems, catalytic capabilities, and opacity enhancement in ceramics and coatings. Built on quality, reliability, and global sourcing strength, we ensure seamless supply chain support across all industries.
Features of Antimony Trioxide
- Highly Effective Flame Retardant Synergist enhancing smoke suppression.
- High-Purity Product suitable for plastics, textiles, and electronics.
- Versatile Industrial Use in PET, glass, ceramics, and coatings.
- Consistent Quality & Particle Size for reliable performance.
- Global Supply Chain ensuring availability and timely delivery.
Why Source Antimony Trioxide Through Elchemy?
- Verified Antimony Trioxide Manufacturer Network: Every Sb₂O₃ producer in the Elchemy network is pre-audited for purity, particle size, and export compliance before onboarding. You deal with one accountable partner for industrial and high-purity grades, and we manage supplier risk.
- Bulk Supply with Transparent Per-Ton Pricing: Source antimony trioxide (CAS 1309-64-4) from samples up to bulk bags and container loads, priced per kg or per ton and scaled to your volume, with a binding quote within 24 business hours.
- High-Purity 99.5% / 99.9% Grades, Fully Documented: Standard industrial grade plus high-purity 99.5% and 99.9% material for electronics, catalyst, and fine-particle flame-retardant use — every order ships with COA, TDS, and a GHS-compliant SDS, with REACH documentation on request.
- Flame-Retardant & PET-Catalyst Ready: Material suited to use as a flame-retardant synergist with halogenated systems and as a PET polymerisation catalyst, with consistent particle-size specification batch to batch.
- Samples Dispatched in 24–48 Hours: Verify purity and particle size before bulk commitment. COA-backed samples are dispatched within 24–48 hours of confirmation.
- 40+ Country Reach Including US-Based Buyers: Elchemy delivers worldwide with quoted lead times, compliant hazard handling, and full export and import documentation for your destination market.
- Effective Flame Retardant Synergist: Enhances flame retardancy and reduces smoke production in various materials.
- High Purity Standards: Ensures optimal performance in plastics, textiles, and electronics.
- Versatile Applications: Used in PET production, glass, ceramics, and as a colorant in paints and coatings.
- Eco-Friendly Production: Committed to sustainable manufacturing practices.
- Reliable Supply Chain: Ensures consistent availability and quality for global markets.
Regulatory Compliance
| Region | Max Allowed Level | Notes | Certification Body |
|---|---|---|---|
| Australia | - | Not permitted in cosmetics; aligns with EU and international bans. | - |
| China | - | Not permitted in cosmetics; listed as a banned substance. | - |
| Japan | - | Not permitted in cosmetics; aligns with EU and international bans. | - |
| Korea, Republic of | - | Not permitted in cosmetics; aligns with EU/ASEAN bans. | - |
| United States | - | Not permitted as an intentional ingredient in cosmetics. OSHA/NIOSH workplace air limit: 0.5 mg/m³ (8-hour TWA) | - |
| ASEAN | - | ASEAN guidance for impurities: <5 mg/kg (as antimony) | - |
| European Union | - | Not allowed in cosmetics except as technically unavoidable impurity. | - |
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