Aluminium sulfate, also spelled aluminum sulfate, is a versatile chemical compound with a wide range of applications. Here's a breakdown of its key properties and uses:
Chemical Properties:
- Formula: Al₂(SO₄)₃
- Appearance: White crystalline solid
- Solubility: Highly soluble in water
Main Uses:
- Water Treatment: Aluminium sulfate is a crucial coagulant used in purifying drinking water and wastewater. It helps suspended impurities clump together (coagulation) and settle down for easier removal through filtration.
- Paper Manufacturing: In paper production, aluminium sulfate acts as a sizing agent. It improves paper quality by enhancing its whiteness and strength.
- Textile Industry: Aluminium sulfate is a mordant, a substance that helps dyes adhere to fabrics. This is particularly useful for dyeing cotton and other natural fibers.
- Soil Acidity: Gardeners sometimes use aluminium sulfate to lower soil pH, making it more acidic. This can be beneficial for plants that thrive in acidic conditions, like blueberries and azaleas.
- Other Uses: Aluminium sulfate has various other applications, including:
- Fire retardant in fire extinguishers
- Astringent in some medical applications
- Leather tanning
- Adjuvant in some vaccines (helps enhance immune response)
