Antimony Trioxide

Description – What is Antimony Trioxide

Product Name: antimony trioxide

Equivalent to: sb2o3, st23

Cas No. : 1309-64-4

Molecular Weight: 291.5

Application – Antimony Trioxide Uses & Markets

Antimony Trioxide Sb2O3 is used as a fire retardant in rubber, plastics, wire & cable, and other composites. It must be used in conjunction with a halogen source, for example, a brominated flame retardant.

Typical Properties

Sb2O3 99.80% Min.
PbO 0.026% Max.
Fe2O3 0.006% Max.
As2O3 0.05% Max.
CuO 0.001% Max.
325 mesh sieve residue 0.05% Max.
Particle size 0.90 – 1.60 µm
Whiteness 93.0% Min.
Specific gravity at 20°C 5.20 typical.

Antimony Trioxide Grade: Sb2O3 has three grades including 99.5%, 99.8%, and 99.9%.

These properties are typical but do not constitute a specification either in part or as a whole. Specification data is available on request from sales, customer service or customer technical service.


Transportation classification: No regulation for transportation.

Packing: 25kg/bag; 1mt/pallet; 20mt/20’FCL.


Antimony Trioxide Shelf Life

60months if storage well.


Is Antimony Trioxide Dangerous Goods?

We have shipping certificates issued by SICIT China and related documents to export antimony trioxide.


Is antimony trioxide hazardous?

yes, it is, Before using and shipping, buyer shall check MSDS, Protection is required to avoid inhalation.


TDS/MSDS Download

AntimonyTrioxide MSDS baoxu chemical

Antimony Trioxide tds baoxu chemical

Baoxu Chemical Flame Retardant Brochure