Ammonium Sulfate N21%

      Ammonium Sulphate N*1% (Industrial premium grade) Pharmaceutical:

Appearance:       

White crystal without visible mechanical impurities

Nitrogen content(N):     

*1.0%         min

Water content(H2O):   

0.2%           max

Free acid(H2SO4):       

0.*3%         max

Iron(Fe):                 

0.**7%       max

Arsenic(As): 

0.****5%   max

Heavy metal(based on Pb):   

0.**5%       max

Insoluble substance in water:

0.*1%         max

                                             Ammonium Sulphate N*1% (Industrial first grade):

Appearance:    

Without visible mechanical impurities

Nitrogen content(N):   

*1.0% min

Water content(H2O): 

0.3%   max

Free acid(H2SO4):

0.*5% max

                                             Ammonium Sulphate N*1% (Agriculture grade):

Appearance: 

Without visible mechanical impurities

Nitrogen content(N):

*0.5% min

Water content(H2O): 

1.0%max

Free acid(H2SO4):

0.2%max