Sodium thiosulphate sodium thiosulphateSodium thiosulphate 99% is used in fixers, plating, leather, reductant, dechlorinating agent, sulfur dyeing agent. 1.Another name: Sodium thiosulfate 2. Molecular formula: Na2S2O3 .5H 2O 3. Molecular weight: 248.17 4.Properties :monoclinic crystal, Melting point : 40 -45oC , Relative density :1.729( 17 oC ). 5.Application:used in fixers, plating, leather, ...