Detergent Raw Material, Water Treatment Raw Material, Food and Feed Additive manufacturer / supplier in China, offering Chemicals 7772-98-7 Na2s2o3 5H2O Sodium Hyposulphide Sodium Thiosulphate, 25kg 99% Na2s2o3.5H2O Industrial Grade Sodium Thiosulphate Pentahydrate Sodium Thiosulfate Crystal, 99% Na2s2o3.5H2O Industrial Grade Sodium Thiosulphate Pentahydrate and so on.