Physico-chemical property: 

Molecular formula: (NH₄)₂SO₄
Molecular weight: 132.14
The product is colorless semi-transparent crystal or powder. It is soluble in water, insoluble in alcohol and acetone.
Executive standard: GB/T1396-1993  

Item	analytically pureAR	chemically pureCP	specific grade
content[(NH4)2SO4]/%≥	99.0	99.0	99.0
pH range(50g/L solution,25℃)	4.8-6.0	4.8-6.0	4.8-6.0
clarity test	qualified	qualified	qualified
water insoluble/%≤	0.002	0.01	0.01
ignition residue(in sulfate)/%≤	0.01	0.05	0.01
chloride(Cl)/%≤	0.0005	0.001
nitrate(NO3)/%≤	0.001	0.005
phosphate(PO4)/%≤	0.0005	0.002
arsenic(As)/%≤	0.00002	0.0002	0.0002
iron(Fe)/%≤	0.0002	0.0005	0.0002
calcium(Ca)/%≤	0.005
heavy metal(in Pb)/%≤	0.0005	0.002	0.002

Use:The product is widely used in pharmaceutical, food, chemical, bioengineering and glass surface treatment field.
Packing:Woven bag inner plastic bag and the net weight is 25kg/bag.