High Purity Antimony Trioxide Sb2O3 Powder CAS 1309-64-4 Chemical Auxiliary Synergistic Flame Retardant For Plastic Rubber Coating Textile Factory

   High purity Antimony Trioxide (ATO) with CAS number 1309-64-4 is the most widely used synergistic flame retardant auxiliary chemical material, refined through stibnite calcination oxidation and multi-stage impurity removal process, supplied in three purity grades to satisfy the procurement demands of global plastic, wire cable, rubber, coating, textile and optical glass manufacturing enterprises. This inorganic oxide powder occupies an irreplaceable core position in the fire safety raw material supply chain due to its unmatched halogen synergistic flame retardant mechanism and stable processing performance.

  Physically, the product presents fluffy bright white fine crystal powder without peculiar odor; it will turn faint yellow under continuous heating above 400℃ and recover pure white after cooling down. Chemically, antimony trioxide shows superior chemical inertness under normal temperature, nearly insoluble in pure water and neutral aqueous solution, while dissolvable in concentrated strong acid and strong alkali to generate antimony salt intermediates. Its melting point reaches 655℃ with stable thermal performance, so it will not decompose or lose flame retardant activity during high-temperature plastic granulation, injection molding and rubber vulcanization procedures.

• Multiple purity options for different industries; high-purity ATO features ≥99.8% Sb₂O₃ content, ultra-low heavy metal impurities, high whiteness above 95%
• Excellent halogen-synergistic flame retardant effect, greatly reduces dosage of brominated/chlorinated flame retardants and lowers production cost
• Good thermal stability at 655℃ melting point, no decomposition during plastic high-temperature extrusion and injection molding
• Narrow particle size distribution, loose texture, outstanding dispersibility without agglomeration in water-based and oil-based systems
• Inhibits combustion free radicals, effectively suppresses smoke and molten dripping during burning, meets international fire safety standards
• Complete inspection documents: ICP-MS impurity test report, COA, MSDS, customs declaration certification
• Flexible supply: small lab trial samples and ton bulk industrial orders with stable spot inventory