Aluminium potassium sulphate dodecahydrate, is also known as Alum.it is a white crystal that is soluble in water. It is made by roasting alunite in a furnace and then harvesting the product by crystallization.
Aluminum potassium sulfate dodecahydrate is an inorganic sulfate salt of aluminum and potassium.Potassium aluminium sulfate dodecahydrate is a hydrate resulting from the the formal combination of anhydrous potassium aluminium sulfate with 12 mol eq. of water.