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High-purity Sb₂O₃ content (≥99.5%) ensuring consistent flame-retardant synergy with halogenated compounds.
Ultra-fine particle size distribution (D₅₀ ≤ 1.5 μm) for excellent dispersion in polymer matrices.
Low heavy metal impurities (Pb < 5 ppm, As < 3 ppm) meeting stringent RoHS and REACH compliance requirements.
Thermally stable up to 650 °C, minimizing decomposition during high-temperature processing.
Non-hygroscopic surface treatment enabling long-term storage stability and reduced agglomeration.
Polyvinyl chloride (PVC) cables and wire insulation.
Acrylonitrile-butadiene-styrene (ABS) housings for electronics and appliances.
Expanded polystyrene (EPS) and extruded polystyrene (XPS) thermal insulation boards.
Polypropylene (PP) automotive interior components.
Textile back-coatings and technical fabrics requiring flame resistance.
| Chemical Type | Antimony(III) oxide (Sb₂O₃) |
| Product Form | White fine powder |
| Appearance | Odorless, free-flowing white powder |
| Assay (Sb₂O₃) | ≥99.5% (by titration) |
| Particle Size (D₅₀) | 1.2–1.5 μm |
| Loss on Ignition (LOI) | ≤0.3% at 1000 °C |
| pH (10% aqueous suspension) | 6.5–7.5 |
| Heavy Metals (Pb, As, Cd, Hg) | Compliant with EU RoHS Directive 2011/65/EU |
Q1: What is the primary role of Shanxing Antimony Trioxide in flame-retardant formulations?
A: Shanxing Antimony Trioxide acts as a synergist—typically used in combination with halogenated flame retardants—to significantly enhance char formation and reduce heat release during combustion. It does not function effectively as a standalone flame retardant.
Q2: Which polymer systems is this grade commonly used in?
A: It is widely applied in halogen-containing thermoplastics such as PVC, chlorinated polyethylene (CPE), and certain brominated epoxy resins, as well as in elastomers and wire & cable compounds where balanced flame performance and process stability are required.
Q3: How does particle size and surface treatment affect its performance?
A: Finer and more uniformly dispersed particles improve compatibility and flame-retardant efficiency. Shanxing Antimony Trioxide is supplied in grades optimized for dispersion in polymer melts, and surface treatments may be applied to reduce agglomeration and support consistent compound rheology.
Q4: Is it suitable for food-contact or medical-grade applications?
A: No—this product is intended for industrial flame-retardant applications only. It is not certified for use in food-contact plastics, pharmaceutical packaging, or medical devices, and should be handled in accordance with occupational health and safety guidelines for inorganic metal oxides.
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E-mail: wangxingqiang@ericwchem.com
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