Sodium thiosulfate
1, Chemical name: Sodium thiosulfate
2, Structural formula:
3, Molecular formula: Na2S2O2· 5H2O
4, Molecular weight: 248.17
5, Properties: Monoclinic crystal, Melting point: 40-45º C, Relative density: 1.729(17º C).
6, Packing: 25kg, 50kg plastic woven bag, or following your demand g.
7, Uses: Used in fixers, plating, leather, reductant, dechlorinating agent, sulfur dyeing agent, as a blush preventive agent, and as a disinfectant. And decolor agent
8, 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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