CI 77002- ▸ Flame retardant: Halogen-free flame retardant for plastics, rubber, and latex foam.
- ▸ Smoke suppressant: Smoke suppressant in polymer compounds.
- ▸ Filler: Functional filler in paper, plastics, and rubber.
- ▸ Abrasive: Soft abrasive for brass and plastics.
- ▸ Desiccant: Desiccant powder.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Aluminum hydroxide (ATH, CAS 21645-51-2) is an inorganic compound used as a flame retardant, smoke suppressant, and functional filler. In plastics, rubber, and latex foams it releases water on heating to retard flame and suppress smoke. It is also used as a filler in paper and as a desiccant and soft abrasive.
Frequently Asked Questions
What is aluminum hydroxide used for?
Aluminum hydroxide (ATH, CAS 21645-51-2) is mainly used as a halogen-free flame retardant and smoke suppressant in plastics, rubber, and latex foams, releasing water on heating to retard flame. It also serves as a functional filler in paper and polymers and as a soft abrasive and desiccant.
What is the common name for aluminum hydroxide?
In industrial use it is commonly called ATH (alumina trihydrate or aluminum trihydroxide). The formula is Al(OH)3 (AlH3O3), CAS 21645-51-2.
How does aluminum hydroxide work as a flame retardant?
On heating, ATH undergoes endothermic decomposition, absorbing heat and releasing water vapor that dilutes combustible gases and suppresses smoke. This makes it a widely used halogen-free flame-retardant filler for polymer compounds.
Is aluminum hydroxide water soluble?
No. Aluminum hydroxide is essentially insoluble in water, which is why it performs as a stable particulate filler and flame-retardant additive dispersed within polymer and rubber matrices.
What grades and packaging of aluminum hydroxide are available in bulk?
ATH is supplied in a range of particle sizes for filler versus flame-retardant applications; specify your target grade and we confirm availability. RawSource ships bulk in bags and palletized quantities under HS 2818.30, with CoA and SDS on request.