Longwater® White Aluminium Sulfate (Solid/Granular/Ground) is also known as Iron-Free Aluminium Sulphate;Alum; aluminium sulphate octadecahydrate Al 2 (SO 4) 3 •18H 2 O, it is one high purity (99.999%) without iron Aluminum Sulphate, Drinking/Potable Water. Longwater® Aluminium Sulphate is manufactured by National Standard and almost equal ...