Aluminium Sulphate Anhydrous

Aluminium Sulphate Anhydrous

Aluminum sulphate, alternatively spelled either aluminum or sulphate, is a chemical compound with the formula Al2(SO4)3. It is soluble in water and is mainly used as a flocculation agent in the purification of drinking water and waste water treatment plants, and also in paper manufacturing.

Aluminum sulfate is sometimes referred to as a type of alum. Alums are double sulfate salts, with the formula AM(SO4)2·12H2O, where A is a monovalent cation such as potassium or ammonium and M is a trivalent metal ion such as aluminum.The anhydrous form occurs naturally as a rare mineral millosevichite, found e.g. in volcanic environments and on burning coal-mining waste dumps. Aluminum sulfate is rarely, if ever, encountered as the anhydrous salt. It forms a number of different hydrates, of which the hexadecahydratehexadecahydrate Al2(SO4)3   16H2O and octadecahydrateoctadecahydrate Al2(SO4)3     18H2O are the most common.en.