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Sodium thiosulfate CAS 7772-98-7
Sodium thiosulfate Quick Detail:
- English name: Sodium thiosulfate
- CAS Number: 7772-98-7
- Molecular Formula: Na2O3S2
- Molecular Weight: 158.11
- EINECS Number: 231-867-5
- Assay: 99.0%min
- Appearance: colorless transparent crystal
Sodium thiosulfate Specification:
| 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 | — | —- |
Sodium thiosulfate Application:
Mainly used in the photographic industry as a fixer. Secondly, it is used as a reducing agent for dichromate during tanning, a neutralizer for nitrogenous exhaust gas, a mordant, a bleaching agent for straw and wool, and a dechlorination agent for pulp bleaching. It is also used in the manufacture of tetraethyl lead, dye intermediates, etc., and silver extraction from ore.
Sodium thiosulfate Package and Storage:
- 25kg/bag or Customized according to customer requirements
- Keep sealed.
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