Product Name: Sodium Thiosulfate
CAS No: 7772-98-7
Einecs No: 231-867-5
HS Code: 2830909000
Formula: Na2S2O3·5H2O
Grade Standard: Tech Grade
Appearance: Colourless transparent crystal
Packaging Details: 25KG/BAG, 50KG/BAG, 1000KG/BAG
Application:
Mining: Flotation agent (depressant)
Food Processing: Chelating agent & antioxidant
Papermaking: Dechlorinating agent for post-bleaching pulp treatment
Textile Printing/Dyeing: Dechlorinator for bleached cotton fabrics
Pharmaceuticals: Detergent/disinfectant applications
Textile Manufacturing: Cotton dechlorinator & wool sulfur dyeing agent
Photography: Photographic fixing agent
Tanning Industry: Dichromate reductant & nitrogenous emission neutralizer
Specification:
| Item | Range | Unit | Standard | |
|---|---|---|---|---|
| High-Class | First-Class | |||
| Purity (Na2S2O3·5H2O) | ≥ | ω/% | 99 | 98 |
| Water insoluble | ≤ | ω/% | 0.01 | 0.03 |
| Sulfide (as Na2S) | ≤ | ω/% | 0.001 | 0.003 |
| Iron (Fe) | ≤ | ω/% | 0.002 | 0.003 |
| Chloride (as NaCl) | ≤ | ω/% | 0.05 | 0.2 |
| pH (200g/L solution) | – | – | 6.5-9.5 | – |
