1. Type: Sodium thiosulfate 2. Molecular formula: Na2S2O2 .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, reductant, dechlorinating agent, sulfur dyeing agent, as a blush preventive agent, and as a disinfectant. and decolor agent 6.Package:25kg , 50kg plastic woven bag, or following your demand.