Chemical Product Library / Reference
Sodium thiosulfate
Chemical identity, technical indicators, performance and application reference. Confirm specifications and regulatory suitability against supplier documentation.
Chemical identity
| English name | Sodium thiosulfate |
|---|---|
| English synonyms | Sodium thiosulfate;Sodium hyposulfite;Hypo |
| Chinese name | 硫代硫酸钠 |
| Chinese synonyms | 大苏打;海波;次亚硫酸钠 |
| Chemical category | Inorganic Salts |
| CAS No. | 7772-98-7 |
| EINECS No. | 231-867-5 |
| Molecular formula | Na2S2O3 |
| Molecular weight | 158.11 |
PubChem structure images are reference depictions, not proof of composition, purity, grade, or regulatory status. Mixtures and polymers may not have a single representative structure.
Technical indicators
Assay ≥99.0% (anhydrous) or ≥99.0% (pentahydrate); water-insoluble matter ≤0.01%; sulfide ≤0.001%; iron ≤0.001%
Performance characteristics
White crystalline powder or colorless crystals, soluble in water, reducing agent
Application scenarios
Photographic fixing agent, water treatment (dechlorination), leather tanning, analytical reagent, pharmaceutical