Sodium Thiosulfate: CAS No:10102-17-7 Molecular Formula:Na2S203?5H20 Molecular Weight:248.18 Na2S2O3.5H2O:99%Min Water Insoluble:0.01%Max Na2S:0.001%Max Iron content:0.002%Max PH value:6.5-9.5 Dechlorination agent for fabrics bleaching; anti-oxidant for food industry, detergent and sterilization antisepsis for medical industry, cleaning agent for drinking water, for Resist agent for activated dyestuff dueing; Tanning agent for tanning industry;Raw material for vermifuge production; Waste water treatment for pesticide industry; Reducing agents for electroplating and ore flotation industries