... 15.8%,16%,17% 2.Fe2O3: 0.47% 3.PH Value:3.1 4.Insoluble:0.1% 5.Aluminum Suphfate MOQ:1MT Aluminium ... .80%min; Fe: 0.50%max; pH: 3.0min; Water Insolubles: 0.15%maxAs: 0.0005%max; Pb: 0.002%max Use: Treatment ... Al2O3, 15.9%min, Fe: 0.007%max, pH: 3.0min, Water Insolubles, 0.15%max Grain size: 15mm max ... 16%min, Fe: 0.005%max, pH: 3.0min, Water Insolubles: 0.15%max, As: 0.0005%max, Pb: 0.002%max Grain size ...