monoclinic crystal,used in fixers, plating, leather, reductant, dechlorinating agent. 1, Chemical name: Sodium thiosulfate 2, Structural formula:3, Molecular formula: Na2S2O2· ... plastic woven bag, or following your demand. 8, Uses: used in fixers, plating, leather, reductant, dechlorinating agent, sulfur dyeing agent, ... preventive agent, and as a disinfectant. and decolor agent Sodium Thiosulfate