... fixers, plating, leather, reductant, dechlorinating agent. 1, Chemical name: Sodium thiosulfate 2, Structural formula:3, Molecular formula: Na2S2O2·5H2O4, Molecular weight ... gradeAnhydrous gradeAppearancecolorless transparent crystal colorless transparent crystal white powderAssay≥99.00%≥98.5%≥98.0%Water Insoluble matter ≤0.01%≤0.03 ... agent, and as a disinfectant. and decolor agent Sodium Thiosulfate