Flame Retardant Additive Antimony Trioxide (Sb2O3) ATO CAS: 1309-64-4

It has limited standalone flame-retardant properties. Its true power lies in its synergy with halogen-based compounds (such as bromine or chlorine). When exposed to heat, it reacts with hydrogen halides released by the burning material to generate antimony halides. These vapors dilute oxygen, absorb massive amounts of heat, and quench free radicals, thereby suppressing the fire efficiently.

Antimony trioxide 99.5% and Antimony trioxide 99.8%

Absolutely. Nano-grade Antimony Trioxide is an excellent alternative to traditional catalysts like antimony acetate in the polycondensation process of Polyethylene Terephthalate (PET). Due to its smaller particle size and higher catalytic activity, it can achieve equivalent or superior results at roughly half the dosage, significantly reducing production costs while improving polymer quality.

The product must be stored in a cool, dry, and well-ventilated warehouse, strictly away from strong acids, alkalis, and direct sunlight. During transportation, ensure the packaging remains sealed and protected from rain and moisture to maintain optimal physical properties and prevent clumping.

While Antimony Trioxide is considered low in acute toxicity, it is classified as a Group 2B carcinogen by the IARC. Therefore, strict occupational safety measures must be implemented. Workers should avoid inhaling dust and wear appropriate personal protective equipment (PPE), including masks and gloves, during handling and processing.