ELRASA – ATOx
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 serves as a catalyst in the production of polyethylene terephthalate (PET) and as an opacifying agent in glass and ceramics.
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CAS Number
1309-64-4
HS Code
28.25.80.00
Molecular Formula
Sb₂O₃
INCI Name
Antimony Trioxide
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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ELRASA – ATOx
Product Specification
Physical Properties
| Property | Specification |
|---|---|
| Odor | Odorless |
| Density | 5.2 at 77 °F |
| Appearance | White crystalline solid |
| Refractive Index | 1.5144 at 589 nm |
| Molecular Weight (G/Mol) | 291.52 |
| Density Or Specific Gravity | 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 |
|---|---|
| Flash Point | Not flammable |
| Boiling Point | 2822 °F at 760 mmHg (sublimes); 1598 °F at 210 mmHg |
| Melting Point | 1211 °F |
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.
Roasting stibnite (Sb₂S₃) at 600–800 °C in oxygen (Yield: ~90%)
Roasting stibnite (Sb₂S₃) at 600–800 °C in oxygen (Yield: ~90%) Raw Materials: Sb₂S₃, O₂ Overall Formula: 2 Sb₂S₃ + 9 O₂ → 2 Sb₂O₃ + 6 SO₂
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.
Roasting stibnite (Sb₂S₃) at 600–800 °C in oxygen (Yield: ~90%)
Roasting stibnite (Sb₂S₃) at 600–800 °C in oxygen (Yield: ~90%) Raw Materials: Sb₂S₃, O₂ Overall Formula: 2 Sb₂S₃ + 9 O₂ → 2 Sb₂O₃ + 6 SO₂
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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