Potassium alum
Potassium alum, potash alum, or potassium aluminium sulfate is the chemical compound: a double sulfate of potassium as well as aluminium, with chemical formula KAlSO42. It is normally encountered as the dodecahydrate, KAlSO42·12H2O. It crystallizes in an octahedral format in neutral solution as well as cubic outline in an alkali solution with space group P a −3 as well as lattice argument of 12.18 Å. The compound is the almost important an necessary or characteristic element of something abstract. of the generic class of compounds called alums, and is often called simply alum.
Potassium alum is ordinarily used in water purification, leather tanning, dyeing, fireproof textiles, and baking powder as E number E522. It also has cosmetic uses as a deodorant, as an aftershave treatment and as a styptic for minor bleeding from shaving.