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Sodium thiosulfate

Testing item                          Analytically pure indicators       
Content(Na2S2O3•5H2O)%               ≥99.0
PH(50g/L solvent,25?):               6.0~7.5
Clarity Test                         Qualified
Water insoluble,%                        ≤0.005
Sodium Chloride(Cl),%                       ≤0.02
Sulfate (SO4),%        ≤0.05
Sulphide(S),%                     ≤0.00025
Total nitrogen (N),%                      ≤0.005
 (Mg),%                         ≤0.001
(Ca),%                        ≤0.003
 (Fe),%                         ≤0.0005
Heavy metal(Pb),%                ≤0. 0005