Sodium thiosulfate
1. Molecular formula: Na2S2O2·5H2O
2, Molecular weight: 248.17
3, Properties: monoclinic crystal, Melting point : 40-45, Relative density :1.729(17).
4, Quality standard:
Item
Photographic grade
Industrial grade
Anhydrous grade
Appearance
colorless transparent crystal
colorless transparent crystal
white powder
Assay
≥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%
PH
6.5~9.5
6.5~9.5
6.5~9.5
Water solution reaction
in accordance with the test
in accordance with the test
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Granularity(g/g)
12~16
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5, Packing:25kg, 50kg plastic woven bag, or following your demand.
6 Uses: used in fixers, plating, leather, reductant, dechlorinating agent, sulfur dyeing agent, as a blush preventive agent, and as a disinfectant. and decolor agent.