Aluminium sulfate, with the chemical formula \( \text{Al}_2(\text{SO}_4)_3 \), is a chemical compound that appears as a white crystalline solid. It is commonly used in various applications, including:
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Water Treatment: Aluminium sulfate is widely used in the purification of drinking water and wastewater treatment. It helps in coagulation, where it binds with impurities and facilitates their removal.
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Paper Manufacturing: It is used in the paper industry as a sizing agent and a coagulant during the production process.
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Textile Industry: Aluminium sulfate is utilized as a mordant in dyeing processes, helping to fix dyes to fabrics.
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Food Additive: It is approved for use as a food additive (E520) in certain products, mainly as a firming agent and to regulate acidity.
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Gardening: Aluminium sulfate is sometimes used in gardening to lower soil pH, making it more acidic for plants that thrive in such conditions (e.g., blueberries and azaleas).
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Fire Fighting Foam: It is used in some types of fire-fighting foam formulations.
When handling aluminium sulfate, it's important to take appropriate safety precautions, as it can be irritating to the skin and eyes, and inhaling its dust can cause respiratory irritation.
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