Applications: In the pharmaceutical industry, it is used in the production of chloroform, phenyl sulfone, ...    More ...

Applications:
In the pharmaceutical industry, it is used in the production of chloroform, phenyl sulfone, and benzaldehyde. In the rubber industry, it is used as a coagulant. In the printing and dyeing industry, it is used as a dechlorinating agent after cotton bleaching and as an auxiliary agent in cotton scouring. In the leather industry, it is used in leather treatment, making the leather soft, full, and tough, with properties such as water resistance, fold resistance, and abrasion resistance. In the chemical industry, it is used in the production of hydroxyvanillin, hydroxylamine hydrochloride, etc. In the photosensitive industry, it is used as a developing agent, etc.
                                           Items
                                          Standard
                     
                                      Appearance
                                          White   or slightly yellowish crystalline powder
                     
                                      Main content ( as Na2S2O5) %
                                          ≥96.5
                     
                                      Fe ，%
                                          ≤0.003
                     
                                      Heavy metals (as Pb) (mg/kg)
                                          ≤5.0
                     
                                      As/（mg/kg）
                                          ≤1.0
                     
                                      Water-insoluble matter %
                                          ≤0.05
                     
                                      Clarity
                                          Through experiments
                     
    
Less ...