SodiumHydrosulphite CASNo.:7775-14-6 Purity:85%,88%,90% Physicalproperty: Formula:Na2S2O4 HazardClass:4.2 CASNo.:7775-14-6 UNNo.:1384. Application:Itiswidelyusedin 1.Vatdyeing,printingandstripping,reductioncleaning 2.Textilematerials(silk,wool,nylonandotherfibers)bleaching 3.Pulpandpaperbrightening 4.Pulpdeinking 5.Kaolinclaybleaching 6.Foodstrffs(srgar,honey,gelatin,etc)bleaching 7.chemicalsynthesizing Package:50kgperirondrum.