Twinkling Star Antimony Flame Retardants

Twinkling Star Antimony Trioxide (ATO) is a white, solid powder that is used as a fire retardant in conjunction with a halogen-based chemical to reduce a product’s flammability. It functions as a synergist thereby reducing the amount of halogen-based product required to achieve desired levels of flammability.

In rigid and plasticized PVC compounds, the addition of ATO will offer excellent flame retardant properties. In other resins that do not contain a halogen, a suitable chlorinated or brominated compound must be added to obtain the required flame retardant properties. It is most suitable for applications where high tint strength is acceptable.

Twinkling Star Properties Limit
Appearance White crystalline powder
Sb2O3 99.5% Min
PbO 0.10% Max
Fe2O3 0.006% Max
As2O3 0.06% Max
CuO 0.002% 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

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