POTASSIUM ALUM

Potassium alum sulfatePotash alumAlum-(K) 10043-67-1Y(dodecahydrate):7784-24-9Y Interactive image(dodecahydrate):Interactive image CHEBI:86463Y(dodecahydrate):CHEBI:86465 23239(dodecahydrate):56418 DB09087 233-141-3(dodecahydrate): 616-521-7 (dodecahydrate):D01724 24856(dodecahydrate):62667 09OXB01F3OY(dodecahydrate):1L24V9R23SY DTXSID401018678(dodecahydrate):DTXSID401018678 InChI=1S/Al.K.2H2O4S/c;;2*1-5(2,3)4/h;;2*(H2,1,2,3,4)/q+3;+1;;/p-4(dodecahydrate): InChI=1S/Al.K.2H2O4S.12H2O/c;;2*1‍​‍‍‍​‍‍‍‍‍‍‍‍​‍-5(2,3)4;;;;;;;;;;;;/h;;2*(H2,1,2,3,4);12*1H2/q+3;+1;;;;;;;;;;;;;;/p-4Key: GNHOJBNSNUXZQA-UHFFFAOYSA-J [O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Al+3].[K+](dodecahydrate): O.O.O.O.O.O.O.O.O.O.O.O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Al+3].[K+] Potassium alum,potash alum, orpotassium aluminium sulfateis achemical compounddefined as the doublesulfateofpotassiumandaluminium, with chemical formula KAl(SO4)2. It is commonly encountered as thedodecahydrate, KAl(SO4)2·12H2O. It crystallizes in an octahedral structure in neutral solution and cubic structure in an alkali solution with space group Pa3and lattice parameter of 12.18 Å.The compound is the most important member of the generic class of compounds calledalums, and is often called simplyalum. Potassium alum is commonly used inwater purification,leathertanning,dyeing,fireprooftextiles, andbaking powderasE numberE522. It also has cosmetic uses as a deodorant, as an aftershave treatment and as astypticfor minor bleeding from shaving.