1lb Potassium Aluminum Sulfate

Potassium aluminum sulfate, commonly known as potash alum or simply alum, is a chemical compound with the formula KAl(SO4)2. It is most frequently encountered as the dodecahydrate, KAl(SO4)2⋅12H2O, a white crystalline substance. This compound is the most prominent member of the alum family, which are double sulfates of monovalent and trivalent cations.