ITEM
 STANDARD
 
sodium sulphate %(Na2SO4)       99.5 MIN. 
                                                    99.0 MIN
                                                    99.0 MIN.

       
 
water insolubles %                    0.01 MAX.
                                                  0.05 MAX.
                                                   0.05 MAX

  
Ca + Mg (as Mg) %                    0.03 MAX.
                                                   0.15 MAX.
                                                   0.15 MAX.

  
chlorides %(Cl)                           0.07 MAX.
                                                    0.35 MAX.
                                                    0.35 MAX.
      
  
iron %(Fe)                                   0.002 MAX.
                                                    0.002 MAX.
                                                    0.002 MAX.

  
moisture %                                     0.20 MAX.
                                                       0.20 MAX.
                                                        0.20 MAX




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