0
VWR Sodium thiosulphate, anhydrous ≥98%, GPR RECTAPUR®
Catalog No :
CAS Number :
Brand :
In Stock
Specifications:
| Application | Analytical Chemistry | ||
| Storage Temperature | Ambient | ||
| Product Type | Laboratory Chemical | Forms | Powder |
| Product Brand | VWR | ||
| Product Grade | Analytical grade | Formula | Na₂S₂O₃ |
VWR Sodium Thiosulphate (Na₂S₂O₃), in its anhydrous form, is a high-purity reducing agent supplied under the GPR RECTAPUR® label with an assay of ≥98%. This crystalline solid is commonly used in iodometric titrations, chlorine neutralization, and redox chemistry, particularly in water analysis, photographic processing, and industrial formulations.
The anhydrous form provides excellent solubility and long-term stability under ambient conditions, making it ideal for laboratories requiring consistent results in analytical and preparative chemistry.
Product Specifications
| Property | Value |
|---|---|
| Product Name | Sodium Thiosulphate, Anhydrous |
| Grade | GPR RECTAPUR®, Analytical Reagent |
| Chemical Formula | Na₂S₂O₃ |
| Molecular Weight | 158.11 g/mol |
| CAS Number | 7772-98-7 |
| MDL Number | MFCD00003499 |
| Merck Index | 12,08844 |
| EINECS Number | 231-867-5 |
| Melting Point | 48 °C |
| Boiling Point | 100 °C (1013 hPa) |
| Density (20 °C) | 1.66 g/cm³ |
| Storage Temperature | Ambient |
| pH (5% solution, 20 °C) | 6.0–8.5 |
| Assay | ≥98% |
Trace Metal Impurities (Max. Limits)
| Element | Limit (ppm) |
|---|---|
| Sulphide (S) | 50 |
| Calcium (Ca) | 50 |
| Cadmium (Cd) | 50 |
| Cobalt (Co) | 50 |
| Copper (Cu) | 50 |
| Iron (Fe) | 50 |
| Potassium (K) | 200 |
| Nickel (Ni) | 50 |
| Lead (Pb) | 50 |
| Zinc (Zn) | 50 |
Packaging Options
| Catalog Number | Pack Type | Pack Size |
|---|---|---|
| 84852.230 | Plastic bottle (solid) | 250 g |
| 84852.290 | Plastic bottle (solid) | 1 kg |
| 84852.460 | Plastic drum | 25 kg |
Applications
- Iodometric titrations (e.g., iodine, chlorine, bromine)
- Dechlorination in water and wastewater treatment
- Photographic fixer in film and paper processing
- Redox chemistry in environmental and industrial labs
- Bleaching and sulfur removal in pulp and textile processing
- Stabilization of analytical reagents in chemical workflows
VWR Sodium Thiosulphate, Anhydrous ≥98%, GPR RECTAPUR®, offers excellent purity and stability for laboratories and industries requiring a dependable reducing agent. With low levels of metal impurities and broad compatibility, it is a go-to reagent for titration, redox chemistry, water testing, and more.
- Pack Size: 250g 1kg 25kg