Alum

Alum is a substance. It is a colourless astringent compound. Chemically, it is a hydrated double sulfate of aluminum and potassium. It is also called potash alum whose chemical formula is AlK(SO₄)₂.12H₂O.

This compound is variously used including in medicinal solutions and in dyeing and tanning industry.

Any of analogous crystalline double sulfates of a monovalent or trivalent mental is also called alum.

Nearby pages
Alum root, Alumbrado, Alumina, Aluminosilicate, Aluminous