Potassium Alum (Potassium Aluminum Sulfate)

Product Description

Potassium alum is commonly used in water purification, leather tanning, dyeing, fireproof textiles, and as a component of baking powder. It also has cosmetic uses as a deodorant, as an aftershave treatment and as a styptic for minor bleeding from shaving.
Potassium alum crystallizes in regular octahedra with flattened corners. Alum is commonly used in crystal growth experiments by students.

Potassium Alum is a colorless to white crystalline powder.  It is also known as Aluminum Potassium Sulfate dodecahydrate. Directions for making crystals can be found at http://catalog.sciencekitstore.com/crystal-growth-instructions. 

formula KAl(SO4)2·12H2O