info@changschem.com

+8618660630765

WEIFANG CITY,SHANDONG PROVINCE, CHINA

Aluminum Hydroxide Manufacturer & Supplier

High Purity ATH Powder For Flame Retardants, Fillers, Plastics, Rubber And Cable Compounds. Engineered for precise particle size distribution and stable thermal processing.

≥99.5% High Purity Control
Endothermic Flame Retardancy
Uniform Particle Size (D50)
Low Smoke Emission (LSZH)
≥95% High Whiteness
Stable Batch Consistency

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Why Aluminum Hydroxide Is Widely Used?

As a non-halogenated flame retardant, ATH decomposes endothermically at 200°C, releasing water vapor to cool the polymer matrix and dilute combustible gases without generating toxic emissions.

Flame Retardant

Absorbs heat during decomposition (1050 J/g), significantly reducing fire propagation risks in compounding applications.

Smoke Suppressant

Lowers smoke generation during combustion by promoting char formation, critical for LSZH cable formulations.

Non-Toxic

Environmentally friendly mineral additive. Releases only water vapor, avoiding corrosive halogenated acid gases.

High Whiteness

≥95% whiteness index makes it suitable for premium filler applications in solid surface and artificial stone.

Thermal Stability

Stable under industrial processing conditions up to 200°C, ideal for EVA, PE, and PVC extrusion processes.

Cost Effective

Excellent performance-to-cost ratio compared to specialized synthetic flame retardants, reducing overall masterbatch costs.

Microscopic view of ATH crystalline structure, ensuring optimal dispersion in polymer matrices.

Aluminum Hydroxide Technical Specifications

When compounders formulate flame retardant masterbatches, strict moisture control (≤0.3%) and precise Al₂O₃ content are mandatory to prevent extruder die build-up and ensure consistent mechanical properties. Our factory laboratory tests every batch prior to shipment.

Item	Specification
Chemical Formula	Al(OH)₃
Appearance	White Powder
Al₂O₃ Content	≥64%
Whiteness	≥95%
Moisture	≤0.3%
pH Value	8.0 - 10.0
Particle Size (D50)	1μm - 50μm (Customized)
Bulk Density	Customized based on application

Aluminum Hydroxide Product Range

Selecting the correct particle size is critical for balancing flame retardancy and resin viscosity. We manufacture a complete range of ATH powders to meet specific compounding requirements.

Fine Aluminum Hydroxide Powder

D50: 3-5μm. Provides an excellent balance of dispersion and mechanical property retention. The standard choice for general compounding.

Primary Applications:

Wire & Cable
Plastic Compounds
Flame Retardants

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Premium

Ultra Fine ATH

D50: 1-2μm. Precipitated processing ensures maximum surface area for superior flame retardancy at lower loading levels.

Primary Applications:

High-End Plastics
Engineering Materials
EVA Compounds

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Industrial Grade ATH

D50: 10-50μm. Coarser particles designed for high-volume filler applications where flame retardancy and cost reduction are balanced.

Primary Applications:

Rubber Mats/Belts
Adhesives & Sealants
Building Materials

Aluminum Hydroxide Applications

From low-smoke zero-halogen (LSZH) cables to artificial marble, ATH is the world's most widely used inorganic flame retardant and functional filler.

Flame Retardant Fillers

Wire & Cable (LSZH)

Rubber Industry

Plastic Compounds

EVA Materials

Adhesives & Sealants

Building Materials

Artificial Stone

Common Challenges In Flame Retardant Materials

Manufacturers facing strict environmental regulations (RoHS/REACH) often struggle with legacy halogenated systems. Here is how ATH powder solves compounding constraints.

Conventional Fillers

❌
Toxic Emissions Halogenated retardants release corrosive acid gases (HCl) during combustion, causing secondary damage to electronics.
❌
Excessive Smoke Poor char formation leads to dense black smoke, failing IEC 61034 visibility tests for building cables.
❌
Processing Difficulties Inconsistent moisture content causes bubbling and die build-up during high-speed extrusion.
❌
Reduced Product Quality Poor dispersion of cheap fillers degrades the tensile strength and elongation of the final polymer.

✓

Aluminum Hydroxide Solution

✔
Non-Toxic Performance Releases only water vapor (H₂O) when heated. 100% halogen-free, passing stringent RoHS and REACH compliance.
✔
Low Smoke Generation Promotes solid char barrier formation, drastically reducing smoke density and preventing fire spread.
✔
Easy Processing Moisture strictly controlled ≤0.3%. Surface-treated options available to lower compound viscosity during extrusion.
✔
Better Material Properties Engineered particle size distribution (D50) ensures smooth surface finish and maintains polymer mechanical strength.

Why Choose Changs Chemical?

As a direct aluminum hydroxide manufacturer, we provide factory-direct pricing, guaranteed batch-to-batch consistency, and robust supply chain security for high-volume industrial buyers.

30+

Years Experience

300k

MT Annual Capacity

50+

Export Countries

200+

Global Customers

OEM

Packaging Ready

Production Process & Quality Assurance

Our advanced milling and classification technology ensures precise particle control. From bauxite processing to final packaging, every step is monitored to prevent agglomeration in your masterbatch.

Raw Materials

Fine Grinding

Classification

QC Inspection

Packaging

Global Shipment

Production Workshop

Laser Particle Analysis

Moisture-Proof Warehouse

Container Loading

Aluminum Hydroxide VS Magnesium Hydroxide

When formulating non-halogenated flame retardants, purchasing managers often compare ATH and MDH. The primary constraint is the processing temperature of the base polymer.

ATH decomposes at approximately 200°C, making it the superior, cost-effective choice for polymers processed below this temperature (like EVA, PE, PVC). If your extrusion temperature exceeds 200°C (e.g., PP, PA), Magnesium Hydroxide (which decomposes at 330°C) may be required despite its higher cost.

Feature	Aluminum Hydroxide (ATH)	Magnesium Hydroxide (MDH)
Decomposition Temp.	~200°C (Lower)	~330°C (Higher)
Flame Retardancy	Excellent	Excellent
Raw Material Cost	Lower (Cost Effective)	Higher
Polymer Compatibility	EVA, PE, PVC, Rubber	PP, PA, ABS
Market Usage	Widely Used (Dominant)	Specialized High-Temp

What Is Aluminum Hydroxide?

Aluminum hydroxide, chemically represented as Al(OH)₃ and commonly referred to in the industry as ATH (Aluminium Trihydrate), is a versatile inorganic compound. Extracted primarily from bauxite ore via the Bayer process, it appears as a fine, white, odorless powder.

In the B2B manufacturing sector, ATH powder is globally recognized as the largest-volume flame retardant. Its mechanism relies on endothermic cooling: at approximately 200°C, the molecule absorbs ambient heat to decompose into aluminum oxide and water vapor. This physical reaction cools the material, dilutes combustible gases, and forms a protective char layer without emitting toxic or corrosive fumes, making it indispensable for modern safety compliance.

Chemical Formula: Al(OH)₃
Also known as: Aluminium Trihydrate
Primary Function: Flame Retardant & Smoke Suppressant

How To Choose The Right Aluminum Hydroxide?

Avoid compounding failures by selecting the correct grade. Follow this 4-step B2B procurement guide to ensure formulation success.

Identify Application

Determine the base polymer (EVA, PVC, Rubber) and processing temperature. Ensure extrusion temps stay strictly below 200°C.

Select Particle Size

Finer D50 (1-3μm) improves flame retardancy but increases viscosity. Coarser D50 (10-50μm) allows higher filler loading for cost reduction.

Evaluate Whiteness

For artificial stone or color-sensitive plastics, demand ≥95% whiteness. For black rubber belts, industrial grades are sufficient.

Verify Supplier

Request sample testing for moisture content (≤0.3%) and verify mass production stability to avoid batch variations.

Frequently Asked Questions

Technical and procurement answers for B2B buyers.

What is aluminum hydroxide used for?

It is primarily used as a halogen-free flame retardant and smoke suppressant in wire and cable compounds, rubber belts, plastic masterbatches, and EVA foams. It is also a critical filler in artificial marble and solid surface manufacturing due to its high whiteness.

Why is ATH used as a flame retardant?

ATH works through an endothermic reaction. When the material temperature reaches ~200°C, ATH absorbs heat and releases water vapor (constituting about 34.6% of its weight). This cools the polymer, dilutes oxygen and combustible gases, and forms a protective aluminum oxide char layer, effectively stopping the fire without toxic smoke.

What is the difference between ATH and magnesium hydroxide?

The main difference is the decomposition temperature. ATH decomposes at ~200°C, making it suitable for polymers processed at lower temperatures (EVA, PE). Magnesium Hydroxide (MDH) decomposes at ~330°C, making it necessary for high-temperature processed plastics like PP or PA, though it is generally more expensive.

Is aluminum hydroxide environmentally friendly?

Yes, it is highly eco-friendly. Unlike brominated or halogenated flame retardants that release toxic and corrosive acid gases, ATH only releases water vapor during combustion. It fully complies with RoHS, REACH, and WEEE directives.

What particle sizes are available?

We manufacture a wide range of D50 particle sizes, from ultra-fine precipitated grades (1-2μm) for high-end plastics, to fine ground grades (3-5μm) for cables, up to industrial grades (10-50μm) for rubber and construction materials. Custom milling is available.

Can you provide customized packaging?

Yes. Standard packaging includes 25kg paper-plastic composite bags and 1000kg/1200kg jumbo bulk bags for automated feeding systems. We offer OEM printing and specialized moisture-barrier packaging upon request.

Trusted By Customers Worldwide

With over 30 years of manufacturing excellence, Weifang Changs Chemical Industry Co., Ltd. has established a robust global logistics network. We guarantee stable supply chains for continuous compound manufacturing operations.