... ,≤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 size,≥10mesh -100mesh Non ferric aluminium sulphate 17.0%