Aluminium potassium sulphate/Posash Alum 1,GB1895-94 2,Purity:99.2% min 3, prompt shipment 4,water treatment Aluminium potassium sulphate/Posash Alum General information :Cas no : 7784-24-9,EINECS NO.:233-141-3ECSECSECS NFormula :AlK(SO4)2.12H2O ,Molecular weight : 474.37 SPECIFICATION:APPEARANCE WHITE CRYSTALS OR POWDERCONTENT 99.2% MIN (ON DRY BASIS)FE 0.02% MAXPB 0.02% MAXWATER INSOLUBLES 0.01 ...