We are the largest manufacturer and exporter of aluminium sulfate in china. The below is detials specification.

Aluminium oxide Al2O3 % min 15.80-17.00
Iron Fe content% max 0.50-0.0005
Water insoluble matter % max 0.15
PH value 1% aqueous solution min 3.0
Heavy metals as Pb % max 0.002
AS % max 0.0005
Type Flakes
Packing 50kg/PPbag
Usage: Used in paper making , printing and dye , tanning leather , fire-fighting equipment , drug and wood preservation , etc.