... ,≥3.03.0As, %≤0.00050.0005Pb, %≤0.0020.002Water Insolubles, %≤0.150.15Grain size,≤15mm2---5mm Non-ferric LevelITEMSTANDARDAl2O3,%≥16Fe, %≤0.005Ph value,≥3.0As, %≤0.0005Pb, %≤0 ... .002Water Insolubles, %≤0.15Grain size,≤15mmAluminium Sulphate PowderItemStandardAl2O3,%≥15.8Fe, %≤0.005 /0.5Ph value,≥3.0Water Insolubles, %≤0.15Grain ...