Specification: Grade A Al2O3:17%min; Fe:0.005%max; PH:3.0min; Insoluble matter in water: 0.1%max, As:0.0005%max; Pb:0.002%max ; Granularity:15mmmax Qualified Product Al2O3:15.8%min; Fe:0.007%max; PH:3.0min; Insoluble matter in water: 0.1%max, As:0.0005%max; Pb:0.002%max ; Granularity:15mmmax Use: Used in papermaking , printing and dye , tanning leather , fire-fighting equipment , drug and wood preservation ,etc Aluminium sulfate is an industrial chemical used as aflocculating agent in the purification of drinking water and waste water treatment plants, and also in paper manufacturing. Aluminium Sulfate is used in water purification and as a mordant in dyeing and printing textiles. In water purification, it causes impurities to coagulate which are removed as the particulate settles to the bottom of the container or more easily filtered. This process is called coagulation or flocculation. Contact: sufieer@sanfengchem.com