About Aluminium Trihydrate

Aluminium Trihydrate Powder (ATH) | Aluminium Hydroxide | Flame Retardant Grade

Product Description

Aluminium Trihydrate Powder (ATH), also known as Aluminium Hydroxide, Aluminium Trihydroxide or Alumina Trihydrate, is a fine white inorganic mineral widely used as a flame-retardant additive, smoke suppressant and functional filler in plastics, PVC, rubber, wire and cable compounds, FRP, paints, coatings, adhesives, sealants and composite materials.

The chemical formula of Aluminium Trihydrate is Al(OH) and its CAS Number is 21645-51-2. citeturn0search1turn0search25

ATH is a halogen-free inorganic flame-retardant material. On heating, it undergoes endothermic decomposition and releases water, which absorbs heat and can help reduce flame propagation and smoke generation in suitable polymer formulations. ATH is widely used in flame-retardant plastics, PVC, wire and cable and other polymer systems. citeturn0search5turn0search24

Lexen Industries & Minerals supplies Aluminium Trihydrate Powder for industrial applications with specifications such as purity and particle size selected according to the customer's formulation and application requirements.

Key Features

• High-purity Aluminium Trihydrate

• Aluminium Hydroxide / ATH Powder

• Fine white inorganic powder

• Halogen-free flame-retardant filler

• Heat-absorbing decomposition mechanism

• Smoke-suppression properties

• High whiteness

• Good mineral filler performance

• Suitable for PVC, plastics and rubber

• Suitable for wire and cable compounds

• Available in different particle sizes

• Bulk industrial supply

• COA and TDS available on request

Technical Specifications

*Typical values. Final specifications should be confirmed against the actual grade-specific COA/TDS.

Thermal Properties

Aluminium Trihydrate does not have a conventional boiling point under normal conditions. Instead, it thermally decomposes and releases water. Therefore, for commercial specifications, it is preferable to state:

Melting Point: Decomposes at approximately 200300C
Boiling Point: Not applicable decomposes before boiling.

This thermal decomposition behaviour is important to ATH's use as a flame-retardant material. citeturn0search24

Applications of Aluminium Trihydrate Powder

PVC & Plastics

• PVC compounds

• PVC profiles

• PVC sheets

• Plastic compounds

• Flame-retardant plastics

• Polymer filler applications

Wire & Cable

ATH is used in selected wire and cable compounds as a halogen-free flame-retardant filler and can contribute to flame and smoke performance depending on the complete formulation. citeturn0search5

Rubber

• Flame-retardant rubber

• Industrial rubber products

• Rubber sheets

• Rubber profiles

• Specialty rubber compounds

FRP & Composite Materials

• Fiberglass reinforced plastics

• Composite materials

• Resin systems

• Solid-surface materials

Paints & Coatings

• Flame-retardant coatings

• Functional mineral filler

• Industrial coatings

• Specialty coating formulations

Adhesives & Sealants

• Flame-retardant adhesives

• Polymer sealants

• Specialty adhesive formulations

Why Choose Lexen Aluminium Trihydrate Powder?

Lexen Industries & Minerals supplies Aluminium Trihydrate Powder for industrial users requiring consistent mineral filler and flame-retardant performance.

We can supply ATH for applications involving:

• PVC

• Plastics

• Rubber

• Wire & Cable

• FRP

• Paints

• Coatings

• Adhesives

• Sealants

• Composite materials

Technical documentation such as COA, TDS and SDS/MSDS can be provided for the applicable grade.

Packaging

Aluminium Trihydrate Powder can be supplied in:

• 25 kg bags

• 50 kg bags

• Jumbo bags

• Bulk/customized packaging

Packaging can be customized according to order quantity and transportation requirements.

Frequently Asked Questions Aluminium Trihydrate Powder

1. What is Aluminium Trihydrate Powder?

Aluminium Trihydrate Powder, commonly called ATH, is Aluminium Hydroxide with the chemical formula Al(OH). It is widely used as a flame-retardant additive and functional mineral filler. citeturn0search1

2. What is the CAS number of Aluminium Trihydrate?

The CAS number is 21645-51-2. citeturn0search1

3. What is Aluminium Trihydrate used for?

ATH is used in PVC, plastics, rubber, wire and cable compounds, FRP, paints, coatings, adhesives, sealants and composite materials.

4. Is Aluminium Trihydrate a flame retardant?

Yes. ATH is widely used as an inorganic, halogen-free flame-retardant filler. Commercial ATH products are specifically marketed for flame-retardant and smoke-suppression applications. citeturn0search24turn0search5

5. What happens to ATH when heated?

ATH undergoes thermal decomposition and releases water. This endothermic process absorbs heat and can contribute to flame-retardant performance in suitable formulations.

6. What is the melting point of Aluminium Trihydrate?

ATH does not have a conventional melting point like many organic materials. It decomposes at approximately 200300C.

7. What is the boiling point of Aluminium Trihydrate?

A conventional boiling point is not applicable, because ATH decomposes before reaching a normal boiling state.

8. What is the density of Aluminium Trihydrate?

The typical specific gravity/density of ATH is approximately 2.42 g/cm, although the measured value can vary with grade and physical characteristics.

9. Is Aluminium Trihydrate soluble in water?

ATH is generally insoluble or practically insoluble in water.

10. Can ATH be used in PVC?

Yes. ATH is used in selected PVC and polymer formulations, including flame-retardant applications. The optimum loading depends on the polymer system and required performance.

11. Can ATH be used in wire and cable compounds?

Yes. ATH is used in suitable wire and cable formulations as a flame-retardant and smoke-suppression filler. Commercial ATH products are available specifically for these applications. citeturn0search5

12. What is the difference between ATH and Antimony Trioxide?

ATH is Aluminium Hydroxide (Al(OH)), while Antimony Trioxide is SbO. They have different flame-retardant mechanisms and formulation requirements. ATH is an inorganic hydroxide filler, whereas ATO is commonly used as a flame-retardant synergist.

13. Can ATH completely replace Antimony Trioxide?

Not automatically. The feasibility depends on the polymer, existing flame-retardant package, loading level, processing temperature and required fire-performance test. Formulation trials should be performed before making a complete substitution.

14. What particle sizes of ATH are available?

ATH can be supplied in different particle-size grades. The appropriate particle size depends on the polymer, loading level, processing conditions and required surface finish. Commercial ATH products are offered in different median particle sizes. citeturn0search23

15. Do you provide COA and TDS?

Yes. COA and TDS can be provided for the applicable product grade, with SDS/MSDS available where required.

16. What packaging is available?

ATH can be supplied in 25 kg bags, 50 kg bags and Jumbo Bags, subject to the customer's requirement.

17. Do you supply Aluminium Trihydrate in bulk?

Yes. Lexen Industries & Minerals accepts bulk industrial enquiries for Aluminium Trihydrate Powder. Buyers can contact us for current availability, specification, MOQ and quotation.

18. Can the ATH specification be customized?

Particle size and selected technical parameters can be offered according to application requirements, subject to grade availability and technical feasibility.