Dried aluminum hydroxide, also known as dry Al(OH)₃ or aluminum trihydrate (ATH), is a white, odorless, and non-toxic powder obtained by removing moisture from wet aluminum hydroxide. It retains the chemical composition of Al(OH)₃ and exhibits excellent flame-retardant, filler, and chemical buffering properties.
Key Properties
- Chemical Formula: Al(OH)₃
- CAS Number: 21645-51-2
- Appearance: White fine powder
- Purity: ≥ 99% (customizable grades available)
- Moisture Content: Typically ≤ 0.5%
- pH Value: Neutral to slightly basic
Compared to wet aluminum hydroxide, the dried form offers easier handling, storage, and dosing accuracy in industrial applications.
Applications of Dried Aluminum Hydroxide Powder
1. Flame Retardants
Functions as a halogen-free flame retardant by decomposing around 200°C, releasing water to cool the material and suppress fire and smoke. Learn more about aluminum hydroxide's flame-retardant behavior on PubChem.
- Used in LSHF cable compounds, PE/EVA resins, rubber insulation
- Compliant with UL 94 V-0, IEC 60332 standards
2. Polymer and Rubber Filler
Improves mechanical properties and thermal stability in plastics and elastomers.
3. Coatings and Paints
Acts as a pigment extender and matting agent in fire-resistant and industrial coatings. See aluminum hydroxide in paints and surface coatings (ScienceDirect).
4. Ceramic and Glass Manufacturing
Serves as an alumina source in high-temperature materials.
5. Pharmaceutical and Cosmetic Uses
In purified form, it is used in antacids and vaccine adjuvants. See FDA Orange Book for aluminum hydroxide listings.
6. Chemical and Environmental Applications
Used in the production of activated alumina, as well as in water treatment and pollution control systems. Refer to U.S. EPA Water Research for water treatment technologies.
Important Considerations of Dried Aluminum Hydroxide
1. Moisture Sensitivity
Dried aluminum hydroxide is hygroscopic. It must be stored in sealed, moisture-proof containers to prevent clumping or reduced functionality.
2. Decomposition Behavior
Begins to release water vapor at around 200–220°C. This must be factored into processing conditions, especially for high-temperature applications. See thermal behavior in MatWeb material database.
3. pH Compatibility
With a slightly basic pH (8–9), it may affect acidic formulations. Always verify chemical compatibility before large-scale use.
4. Particle Size Selection
Available in fine to coarse grades. Select the appropriate particle size for target viscosity, dispersion, and surface finish.
5. Surface Treatment Options
Surface-modified grades (e.g., silane-treated) are better suited for hydrophobic matrices like rubber and plastics.
6. Purity Grades
Available in industrial and pharmaceutical grades. Ensure the selected grade matches your regulatory and performance needs. Check ECHA REACH database for regulatory compliance.
7. Handling and Safety
While non-toxic, the powder can be dusty. Use appropriate personal protective equipment (PPE). Refer to NIOSH Guide for Aluminum Compounds.
8. Storage Conditions
Store in a dry, ventilated area. Avoid stacking under pressure or exposing to moisture, which may lead to agglomeration or performance loss.
Packing and shipping
1) 25kg woven bag,40 woven bags/jumbo bag.
2) 25kg woven bag,40 woven bags/pallet
3) 25kg paper bag,40 paper bags/pallet
4) 25kg paper bag,40 paper bags/paper box
5) 1000kg /big bag.
6) According you your needs.
Partner with Banlan
Banlan offers consistent-quality dried aluminum hydroxide powder suitable for a wide range of industries. We provide tailored grades, fast delivery, and technical support for both standard and custom specifications.
Our main products are aluminium hydroxide, calcined alumina, Tabular Alumina, activated alumina balls. We have professional equipment, advanced technology, perfect team guidance, mature trading system, we are confident in the pre-sale and after-sales stage to provide the best service and quality assurance. I hope we can cooperate happily, thank you! If you have any requirements, please contact us and we will provide you with competitive prices and the best service.
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