east of Lindong Road,Linjiang industrial zone,haimen city, Jiangsu, China
+86-513-68908066 68908056
Sodium thiosulfate
1, Chemical name: Sodium thiosulfate
2, Structural formula:
3, Molecular formula: Na2S2O25H2O
4, Molecular weight: 248.17
5, Properties: monoclinic crystal, Melting point40-45℃, Relative density
:1.729(17℃).
6, 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 | ---- |
Granularity(g/g) | 12~16 | --- | ---- |
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