1. Product Description
Aluminium hydroxide, Al(OH)3, is found as the mineral gibbsite (also known as hydrargillite) and its three much rarer polymorphs: bayerite, doyleite, and nordstrandite. Aluminium hydroxide is amphoteric, i.e., it has both basic and acidic properties. Closely related are aluminum oxide hydroxide AlO(OH), and aluminum oxide or alumina (Al2O3), the latter of which is also amphoteric. These compounds together are the major components of the aluminum ore bauxite. Aluminium hydroxide also forms a gelatinous precipitate in water.
2. Physical & Chemical Properties
| Property |
Value |
| CAS Number |
21645-51-2 |
| Molar Mass |
78.004 g/mol |
| Density |
2.42 g/cm³ |
| Solubility |
Insoluble in water/ethanol; soluble in strong acids/alkalis |
| Decomposition Temperature |
~300°C |
| Transport Classification |
NONH (non-dangerous) |
3. Application
1. Flame Retardant & Filler (largest use): For plastics, rubber, coatings; releases water upon heating to cool the matrix, suppress combustion.
2.Alumina Feedstock: Calcined to produce alumina (Al2O3) for aluminum smelting.
3.Water Treatment & Paper: Coagulant aid, paper sizing filler, catalyst carrier, adsorbent.
4.Vaccine Adjuvant: Alhydrogel is a widely used adjuvant to enhance immune response.
4.Trade & Compliance Essentials (for export/import)
1.HS Code 2818300000 (China); declaration elements: brand type, preferential status, composition content, GTIN, CAS No. (21645-51-2).
2.Export Control: No special license required for general grades in China; check destination country’s chemical registration (e.g., REACH in EU, TSCA in US, Malaysia’s DOSH requirements).
3.Documentation: Commercial invoice, packing list, bill of lading/air waybill, MSDS (SDS), certificate of analysis (CoA); some markets may need a certificate of origin (COO).
4.Packaging & Handling: Pack in moisture-proof bags (25 kg/bag, 1000 kg big bag); avoid dust inhalation; provide SDS to workers and carriers.
5. Package, Transportation and Storage
Package: Internal plastic with knitted exterior covered with film, with the net weight of 20kg, 25kg or 40kg.
Transportation: The product is of dangerous one, which should be protected from damp, rainfall and package damage in transportation.
Storage: At dry warehouse with good ventilation.
6.Our Services
1.Free samples available before confirming the order to avoid any problems.
2.Goods delivered directly from the factory warehouse after well produced in a high quality and good situation.
3.Competitive price.
4.Prompt shipment, usually within 10 working days after confirming the order.
5.Testing equipment: SGS, UV, HPLC, GC, CIQ.
6.Supply Ability: 2000MTS/month, large stock available.
7. FAQ
1. Do you provide samples?
We can supply you samples definitely. Sample testing is one of the standards to reassure customers Custom-made and Special Design are available.
2. How is your price? What is your payment term?
For Orders, our payment term is T/T 30% in advance and the balance 70% before loading. Other payment terms can be negotiable.
3. What is your minimum order quantity?
MOQ can be negotiable, in order for customer's benefit and for our long term cooperation.
4. How long for manufacturing the order?
10-20days after receiving deposit.
5 .How can we guarantee quality?
Always a pre-production sample before mass production.
Ihre Nachricht muss zwischen 20 und 3.000 Zeichen enthalten!
