What is Aluminum Hydroxide?

Aluminum hydroxide, whose chemical name is Al(OH)3, is a natural mineral. Industrial preparation uses bauxite for purification. It is widely used in various industries. It can be divided into industrial grade and pharmaceutical grade according to its use.

Chemical properties:

Aluminum hydroxide (CAS: 21645-51-2) appears as a white powder, insoluble in water, with a relative molecular mass of 78.004, a density of 2.40 g/cm³, and a melting point of 300°C. It is composed of aluminum, oxygen, and hydrogen atoms. It forms a crystal structure, can heat and lose water to generate aluminum oxide and water, and does not produce other impurities and toxic substances, so it can be used as a good fire-proof and flame-retardant material.

Acidity/alkalinity: According to the Brønsted-Lawley proton theory of acids and bases, it is both an acid and a base and can react with many substances.

Antacids (medical): Aluminum hydroxide is commonly used in antacid medications to neutralize stomach acid and relieve heartburn and indigestion. It reacts with excess gastric acid to form aluminum salts and water. The reaction equation is as follows:

Pharmaceutical Excipients: In addition to its use in antacids, aluminum hydroxide is also used as an excipient in pharmaceutical preparations, especially in vaccines, to enhance stability and adjuvant effects

Flame Retardant: Because aluminum hydroxide can release water vapor when heated to generate aluminum oxide, this reaction does not produce new harmful substances or smoke, so it can be used as a flame retardant for plastics, rubber, textiles, and other materials, or as an additive to enhance the fire resistance of materials. In addition, the water decomposed by the reaction can absorb heat to release water vapor and cool the material, thereby inhibiting combustion. The principle of the reaction is as follows:

The PF-1 type ultrafine aluminum hydroxide produced by our company has many advantages such as high content, high whiteness, small particle size, and uniform particle size distribution. It can be used as a good halogen-free flame retardant additive and is widely used in cable&wires and refractory materials. among.

Water Treatment: Aluminum hydroxide is used in water treatment processes to remove impurities and particles. It acts as a flocculant, using its hydrolysis principle as a weak acid. It can be hydrolyzed under acidic conditions to obtain aluminum hydroxide colloids. It has adsorption and flotation effects and can help the coagulation and precipitation of suspended solids and impurities in the water. It is the most commonly used The water purifying agent is alum (potassium aluminum sulfate dodecahydrate). The reaction principle is as follows:

Our PF-COP type of aluminum hydroxide can meet your water treatment needs. The average particle size distribution is 5-7 microns. In addition, BMC&SMC, adhesives, etc. can be used.

Catalyst or Catalyst Carrier: In some chemical reactions, aluminum hydroxide can serve as a carrier for the catalyst or even directly act as a material for the reaction, such as:

Al(OH)3-Catalyzed Feedstock Recycling of Poly(L-lactic acid)

Cosmetics: Sometimes incorporated into cosmetics and skin care products as fillers or pigments.

Aluminum hydroxide is an important inorganic raw material. Its most widely used application is in flame retardant properties. It is non-toxic and non-polluting, has high mechanical strength, simple post-processing, low cost and can act as filler without affecting product performance. Reduce the amount of main product added and other advantages.

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