Alum Powder | Potassium Aluminum Sulfate

Alum Powder, commonly referring to Potassium Alum (KAl(SO₄)₂·12H₂O), is a white crystalline substance widely used for its astringent, antiseptic, and coagulating properties. It is water-soluble and mildly acidic, making it versatile for applications in various industries.



Applications

  • Water Treatment: Acts as a flocculant to purify water by removing impurities.
  • Cosmetics: Used in deodorants, aftershave astringents, and facial toners for it’s antimicrobial and tightening properties.
  • Food Industry: Employed in pickling, baking powders, and as a firming agent in foods.
  • Textile Industry: Utilized in dyeing and tanning as a mordant to fix dyes onto fabrics.
  • Medicinal Uses: Helps in treating minor cuts and as an oral rinse for mouth ulcers.
  • Other Uses: Found in fireproofing compounds, paper manufacturing, and even as a natural antiperspirant.
CAS Number

7784-24-9

Appearance

White crystalline powder

Chemical Formula

KAl(SO₄)₂·12H₂O

Solubility

Soluble in water

pH

3.0 ± 0.5

Melting Point

Decomposes at ~92 °C

Density

~1.75 g/cm³

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