Aluminum sulfateITEM SPECIFICATION RESULT Average Size Of Flakes, max 20mm Conformed Aluminum oxide Al2O3 %, min 15.600 15.67 Iron (Fe) content %, max 0.005 0.0048 Water insoluble matter %, max 0.15 0.10 PH value 1% aqueous solution, min 3.0 3.1 As %, max 0.0005 0.0004 Heavy metals as Pb %, max 0.002 NONE DETECTED