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Antimony Trioxide 99.5%
Sinobio
28258000
Retardant Antimony Trioxide (Sb₂O₃) is a white crystalline powder with 99.5% purity and CAS 1309-64-4, widely recognized as a potent flame retardant synergist in halogen-based systems. Produced through controlled oxidation of antimony metal, it exhibits a cubic crystal structure that enhances its reactivity with halogenated compounds. When combined with halogen-based compounds (e.g., brominated or chlorinated flame retardants), it forms a charring layer during combustion, which inhibits flame spread and reduces toxic smoke emissions by up to 40%. Its high thermal stability (stable up to 600°C) and chemical inertness (resistant to acids and alkalis in normal conditions) make it indispensable in plastics, rubber, and textiles across automotive, construction, and electronics industries.
Parameter | Value |
Purity | ≥99.5% |
Appearance | Fine white powder |
Particle Size | ≤2 μm (90% passing) |
Melting Point | 656°C |
Density | 5.2 g/cm³ |
Solubility | Insoluble in water |
Loss on Ignition | ≤0.1% (105°C, 2h) |
Heavy Metals | ≤10 ppm |
Flame Retardancy Synergy:
Reduces the required dosage of halogen-based flame retardants by up to 50% through formation of antimony trihalide vapors (SbX₃) that quench free radicals in the flame zone.
Forms a glass-like barrier during combustion, blocking oxygen and heat transfer to underlying material, achieving V-0 rating in UL 94 tests for most polymers.
Reduces smoke density by 30–50% compared to halogen-only systems, as measured by ASTM E662.
Wide Material Compatibility:
Effective in polypropylene (PP), polyethylene (PE), PVC, ABS, and epoxy resins with typical addition levels of 3–10 phr.
Suitable for high-temperature applications (e.g., electrical components operating at 100–150°C) due to its high melting point.
Does not affect mechanical properties (tensile strength, impact resistance) when properly dispersed in polymer matrices.
Environmental Safety:
Low toxicity (LD50 >5,000 mg/kg in oral rat tests) compared to other flame retardants like arsenic compounds.
Complies with RoHS (2011/65/EU) and REACH (EC 1907/2006) regulations when used in approved formulations with halogenated flame retardants.
Minimal dusting during processing with proper handling, reducing workplace exposure risks.
Electronics: Used in PC/ABS alloys for laptop casings and connectors, achieving UL 94 V-0 rating at 1.6mm thickness and improving fire resistance in printed circuit boards.
Automotive: Enhances fire resistance in dashboard materials (PP/ABS blends) and wiring insulation (PVC and XLPE), meeting FMVSS 302 standards for interior materials.
Construction: Improves the flame rating of PVC pipes (achieving ASTM E84 Class A) and foam insulation (polyurethane), reducing fire spread in building structures.
Apparel: Imparts fire resistance to workwear (cotton-polyester blends) and curtains (polyester), meeting NFPA 701 flame propagation standards.
Paints: Reduces flammability in intumescent coatings for steel structures, expanding fire resistance time from 30 to 90 minutes in ASTM E119 tests.
Tires: Enhances fire safety in heavy-duty vehicle tires (natural rubber/synthetic rubber blends), reducing combustion rate by 40% during accidental fires.
Sealants: Improves the flame retardancy of industrial gaskets (EPDM and silicone rubber), ensuring safety in high-temperature industrial equipment.
Retardant Antimony Trioxide (Sb₂O₃) is a white crystalline powder with 99.5% purity and CAS 1309-64-4, widely recognized as a potent flame retardant synergist in halogen-based systems. Produced through controlled oxidation of antimony metal, it exhibits a cubic crystal structure that enhances its reactivity with halogenated compounds. When combined with halogen-based compounds (e.g., brominated or chlorinated flame retardants), it forms a charring layer during combustion, which inhibits flame spread and reduces toxic smoke emissions by up to 40%. Its high thermal stability (stable up to 600°C) and chemical inertness (resistant to acids and alkalis in normal conditions) make it indispensable in plastics, rubber, and textiles across automotive, construction, and electronics industries.
Parameter | Value |
Purity | ≥99.5% |
Appearance | Fine white powder |
Particle Size | ≤2 μm (90% passing) |
Melting Point | 656°C |
Density | 5.2 g/cm³ |
Solubility | Insoluble in water |
Loss on Ignition | ≤0.1% (105°C, 2h) |
Heavy Metals | ≤10 ppm |
Flame Retardancy Synergy:
Reduces the required dosage of halogen-based flame retardants by up to 50% through formation of antimony trihalide vapors (SbX₃) that quench free radicals in the flame zone.
Forms a glass-like barrier during combustion, blocking oxygen and heat transfer to underlying material, achieving V-0 rating in UL 94 tests for most polymers.
Reduces smoke density by 30–50% compared to halogen-only systems, as measured by ASTM E662.
Wide Material Compatibility:
Effective in polypropylene (PP), polyethylene (PE), PVC, ABS, and epoxy resins with typical addition levels of 3–10 phr.
Suitable for high-temperature applications (e.g., electrical components operating at 100–150°C) due to its high melting point.
Does not affect mechanical properties (tensile strength, impact resistance) when properly dispersed in polymer matrices.
Environmental Safety:
Low toxicity (LD50 >5,000 mg/kg in oral rat tests) compared to other flame retardants like arsenic compounds.
Complies with RoHS (2011/65/EU) and REACH (EC 1907/2006) regulations when used in approved formulations with halogenated flame retardants.
Minimal dusting during processing with proper handling, reducing workplace exposure risks.
Electronics: Used in PC/ABS alloys for laptop casings and connectors, achieving UL 94 V-0 rating at 1.6mm thickness and improving fire resistance in printed circuit boards.
Automotive: Enhances fire resistance in dashboard materials (PP/ABS blends) and wiring insulation (PVC and XLPE), meeting FMVSS 302 standards for interior materials.
Construction: Improves the flame rating of PVC pipes (achieving ASTM E84 Class A) and foam insulation (polyurethane), reducing fire spread in building structures.
Apparel: Imparts fire resistance to workwear (cotton-polyester blends) and curtains (polyester), meeting NFPA 701 flame propagation standards.
Paints: Reduces flammability in intumescent coatings for steel structures, expanding fire resistance time from 30 to 90 minutes in ASTM E119 tests.
Tires: Enhances fire safety in heavy-duty vehicle tires (natural rubber/synthetic rubber blends), reducing combustion rate by 40% during accidental fires.
Sealants: Improves the flame retardancy of industrial gaskets (EPDM and silicone rubber), ensuring safety in high-temperature industrial equipment.
