Sodium thiosulphate sodium thiosulphateSodium thiosulphate 99% is used in fixers, plating, leather, reductant, dechlorinating agent, sulfur dyeing agent.1. ... -45oC , Relative density :1.729( 17 oC ). 5.Application:used in fixers, plating, leather, reductant, dechlorinating agent, sulfur dyeing agent, as ...