Sodium thiosulfate used in fixers, plating,, reductant, dechlorinating agent, sulfur dyeing agent, as a blush preventive ItemPhotographic gradeIndustrial gradeAnhydrous gradeAppearancecolorless transparent crystalcolorless transparent crystalwhite powderAssay≥99.00%≥98.5%≥97.0%Water Insoluble matter≤0.01%≤0.03%≤0.03%Sulfide≤0.001%≤0.003%≤0.001%Fe≤0.001%≤0.003%≤0.005%PH6.5~9.56.5~9.56.5~9.5Water ...