三水和物水酸化アルミニウム

Tri hydrate aluminum hydroxide (chemical formula Al (Al(OH)₃·3H₂O, abbreviated as ATH) is regarded as an ideal material with both performance and compliance by industries such as plastics, rubber, and environmental protection due to its high flame retardancy, smoke suppression, non toxicity, and wide applicability.

Trihydrate aluminum hydroxide is a white crystalline powder with a molecular structure containing 3 molecules of crystal water (weight loss rate of 34%). It decomposes when heated to 240 ℃, releasing water vapor and absorbing a large amount of heat (heat absorption value of 1.96kJ/g), achieving flame retardant and smoke suppression effects. It combines the stability and environmental friendliness of inorganic materials, with a purity of ≥ 99% and a heavy metal content of<5ppm. It has been certified by ISO 9001 and ISO 14001 systems, complies with GB 25572-2010 food additive standards and EU REACH regulations, and is an ideal alternative to traditional halogen flame retardants.

Physical and Chemical Properties

General Properties

Molecular Weight	78
Density	2.42 g/cm3
Crystal System	Monoclinic System
Mohs Hardness	3
Ratio of Refraction	1.57
Appearance	White Powder

Fine Precipitated Aluminium Hydroxide.

Items	Unit	Index
Al(OH)3	%	≥99.4
SiO2	%	≤0.02
Fe2O3	%	≤0.02
Na2O	%	≤0.3
Na2O (Soluble)	%	≤0.015
Moisture	%	≤0.3
Loss on ignition (600℃ )	%	34.5±0.5
Whiteness	%	≥96
Particle size D50, Laser diffraction	μm	1.2~1.6
Particle size D50, Laser diffraction	μm	1.6~2.1
PH value	—	8.0-10.0
Oil absorption (linseed oil)	Ml/100g	≤40
Electrical conductivity	us/cm	≤30
Residue on Sieve	%	≤0.01

Key Advantage:

Low Na2O%: (Soluble Na2O%≤0.015%)

Low Electrical conductivity：≤30μs/cm

Low Residue content(on sieve)：≤0.01% (400Mesh)

Less black spots and impurities：≤25/100gram

Application:Recommended to be used in wires and cables, copper clad plates(CCL), composite insulators, heat insulation material, etc.

Plastic industry:

Used for PP, PE, PVC and other products, the recommended addition amount is 40-60%, which can improve the flame retardant level and enhance the rigidity of the product (increase the bending modulus by 10%). It is suitable for home appliance shells and automotive interior parts.

Rubber industry:

Adding 50-70% to nitrile rubber (NBR) and silicone rubber can meet the requirements of flame retardant conveyor belts, cable sheaths, etc., while enhancing aging resistance (UV aging performance retention rate ≥ 85% after 500 hours).

Wastewater treatment:

As a neutralizing agent to replace caustic soda, it is used for the treatment of acidic wastewater in the chemical and electroplating industries, reducing COD content while avoiding the introduction of sodium ions, and reducing treatment costs by 15%.

Flue gas desulfurization:

Used for desulfurization systems in power plants and steel plants, it reacts with SO ₂ to generate recyclable aluminum sulfate, with higher desulfurization efficiency than traditional lime methods. The by-products can be used as coagulants in water treatment.

Paint industry:

As a flame retardant filler, adding 30-50% can increase the fire resistance limit of the coating (≥ 2h), suitable for steel structure fireproof coatings and ship anti-corrosion coatings.

Pharmaceuticals and cosmetics:

High purity products (impurities ≤ 0.1%) can be used as antacids, skin protectants, and cosmetic thickeners, meeting pharmacopoeial standards such as USP and EP.

Packaging:Net weight 25kg/bag, Compound paper-plastic bag

Storage and Attention: Keep in dry, room temperature and moisture proof condition, preventing the heating

Aluminum hydroxide (ground type)

Items	Unit	ATH-10	ATH-12	ATH-17	ATH-20
Al2O3	%	≥64.0	≥64.0	≥64.0	≥64.0
SiO2	%	≤0.04	≤0.04	≤0.04	≤0.04
Fe2O3	%	≤0.02	≤0.02	≤0.02	≤0.02
Na2O	%	≤0.4	≤0.4	≤0.4	≤0.4
Loss On Ignition	%	34.0~35.0	34.0~35.0	34.0~35.0	34.0~35.0
Moisture	%	≤0.3	≤0.3	≤0.3	≤0.3
Mean Particle Diameter	µm	8~12	12~15	15~18	18~22
Whiteness	HW-A	≥95	≥95	≥95	≥95
Whiteness	HW-B	≥93	≥93	≥93	≥93
Whiteness	GW	≥90	≥90	≥90	≥90
Whiteness	HW-A	≥95	≥95	≥95	≥95
pH value		8.5~11.5	8.5~11.5	8.5~11.5	8.5~11.5

Application:Recommended to be used in plastics composites, conveyer belt, epoxy sealing and other rubber based compounds

Packaging:Net weight 25kg/bag, Compound paper-plastic bag

Storage and Attention: Keep in dry, room temperature and moisture proof condition, preventing the heating 

Low-viscosity Aluminum Hydroxide

Items	Unit	HT-205 LV-2	HT205 LV-3	HT-205 LV-5	HT-205 LV-8
（Al2O3）	%	≥64.5	≥64.5	≥64.5	≥64.5
（SiO2）	%	≤0.04	≤0.04	≤0.04	≤0.04
（Fe2O3）	%	≤0.02	≤0.02	≤0.02	≤0.02
（Na2O）	%	≤0.4	≤0.4	≤0.4	≤0.4
Loss on Ignition(1100°C)	%	34.～ 35.0	34.0 ～ 35.0	34.0 ～ 35.0	34.0 ～ 35.0
Moisture (105 °C)	%	≤0.5	≤0.5	≤0.5	≤0.5
Whiteness	%	≥96	≥94	≥93	≥92
pH	--	8.5 ～ 11.5	8.5 ～ 11.5	8.5 ～ 11.5	8.5 ～ 11.5
Particle Size ,D50	µm	≤2.8	2 ～ 4	4 ～ 6	6 ～ 9

Key advantages

● Low viscosity
● Narrow particle size distribution
● Optional different grades
● Low oil absorption
Application: Low-viscosity Aluminum Hydroxide is widely used in BMC, SMC, laminate, pouring sealant and other industries.
Packaging:Net weight 25kg/bag, Compound paper-plastic bag
Storage and Attention: Keep in dry, room temperature and moisture proof condition, preventing the heating

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