Antimony trioxide (Sb2O3, CAS 1309-64-4) is a fine white oxide powder serving two roles: a flame-retardant synergist and a polycondensation catalyst. In halogenated systems it reacts with the halogen source to form antimony trihalides and oxyhalides in the gas phase, scavenging the H and OH radicals that propagate combustion while promoting a protective char layer. Loading typically runs 2-6 wt% Sb2O3 alongside a halogen donor, tuned to the target UL-94 rating and polymer matrix. As a PET catalyst it accelerates esterification and polycondensation at roughly 200-300 ppm Sb on resin weight. Uses span flame-retardant plastics and textiles, PET resin and fiber, glass and ceramic decolorizing, and pigments and paint. This grade assays Sb2O3 >= 99.5% with As2O3 <= 0.05%, PbO <= 0.05%, and Fe2O3 <= 0.005%; whiteness >= 95% and a controlled 0.3-1.5 micron particle size give consistent dispersion and color hold. Each lot ships with COA and MTC. Multi-regional sourcing supports CIF Marmara delivery, Gebze bonded stock, and 20 MT FCL lots. Send your grade and tonnage for an RFQ.
| Sb₂O₃ | ≥ 99.5% |
| As₂O₃ | ≤ 0.05% |
| PbO | ≤ 0.05% |
| Fe₂O₃ | ≤ 0.005% |
| Whiteness | ≥ 95% |
| Particle | 0.3-1.5 µm |
| CAS | 1309-64-4 |
Antimontrioxid (Sb₂O₃)
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