Used in the purification of water, papermaking, glue spreading, painting dyeing, leather producing, fiber board processing and used in rubber production and the fermentation of foodstuffs.
Specifications: 1) kAl (SO4)2.12H2O: 99.2% min 2) Heavy metals: 0.002% max 3) Fe: 0.01% max 4) As: 0.0002% max 5) Water-insoluble substance: 0.2% max 6) Water: 1.0% max 7) Appearance: no color, transparent, agglomeration, or crystal