We offer aluminum sulphate. 
【product description】
molecular formula: al2(so4)3
properties: including anhydrous and hydrous(*8 crystal water) type. Usually, the crystal separated out from aqueous solution at the normal temperature is al 2 (so 4 ) 3.*8h 2 o; when weathering, the average molecular structure is al 2 (so 4 ) 3.*4h 2 o, may appear white powdery, with bright flake or crystalline flakelet, odorless, to change the taste from sweetness to slight astringency. 

【specification】
aluminium sulphate *6%

appearance: white flakesgranules power
al2o3 *6% min
fe 0.4% max
ph value 3.0 min
water-insoluble matter 0.*5% max
as 0.***5% max
pb 0.**2% max
size *5mm max

aluminium sulphate *7%

appearance: white flakesgranules power
al2o3 *7% min
fe 0.*1% max
ph value 2.6 min
water-insoluble matter 0.*5% max
as 0.***5% max
pb 0.**2% max
size *5mm max

【application】
(1)treatment of drinking water and industrial water. 
(2)high-grade paper making. 
(3)high-grade titanium pigment production.