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What are the uses of aluminum hydroxide powder?
2025-05-12
Aluminum hydroxide powder has various applications across different industries due to its chemical properties, such as being amphoteric (reacting with both acids and bases), non-toxicity, and thermal stability. Here are its main uses: ### 1. **Medical Applications** - **Antacid Medications**: It is widely used in over-the-counter drugs to treat heartburn, indigestion, and stomach ulcers. As an antacid, it neutralizes excess stomach acid (hydrochloric acid) without producing gas, forming aluminum chloride and water. - **Vaccine Adjuvant**: In vaccines, it helps enhance the immune response by adsorbing antigens, improving their presentation to immune cells. ### 2. **Industrial and Manufacturing Uses** - **Flame Retardant**: When added to plastics, rubber, and synthetic materials, it acts as a flame retardant. Upon heating, it decomposes to release water vapor, which cools the material, reduces oxygen availability, and suppresses smoke formation. - **Filler and Reinforcement**: In polymers, ceramics, and coatings, it serves as a filler to improve mechanical properties (e.g., strength, durability) and enhance fire resistance. It is also used in paper manufacturing to boost whiteness and opacity in coatings. - **Catalyst and Catalyst Support**: In chemical reactions (e.g., hydrocarbon processing), it can act as a catalyst or support for other catalysts due to its porous structure and surface area. ### 3. **Water Treatment** - **Flocculant**: In wastewater treatment, aluminum hydroxide (often generated in-situ from aluminum salts) helps remove suspended solids and impurities by forming flocs, which settle and are filtered out. ### 4. **Cosmetics and Personal Care** - **Antiperspirants**: It is used in deodorants and antiperspirants as an astringent to temporarily block sweat ducts, reducing perspiration. - **Thickening Agent**: In creams and lotions, it can stabilize emulsions and adjust texture. ### 5. **Ceramics and Glass** - **Raw Material**: In ceramic manufacturing, it contributes to high-temperature resistance and purity. It is also used in glass production to improve chemical durability and mechanical strength. ### 6. **Food Industry** - **Food Additive**: As an anticaking agent (e.g., E520) in powders like salt or spices, it prevents clumping. It may also be used as an acid neutralizer in certain food products. These applications leverage aluminum hydroxide’s versatility in neutralizing acids, resisting heat, adsorbing substances, and providing structural support, making it valuable in healthcare, industry, and daily consumer products.
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