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VWR Sodium thiosulphate pentahydrate 99.5-100.5%, AnalaR NORMAPUR® ACS analytical reagent
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Specifications:
| Application | Analytical Chemistry | ||
| Storage Temperature | Ambient | ||
| Product Type | Laboratory Chemical | Forms | Powder |
| Product Brand | VWR | ||
| Product Grade | Analytical grade | Formula | Na₂S₂O₃.5H₂O |
VWR Sodium Thiosulphate Pentahydrate (Na₂S₂O₃·5H₂O) is a high-purity, crystalline reagent with an assay range of 99.5–100.5%, compliant with both ACS and AnalaR NORMAPUR® standards. It is commonly used as a reducing agent in iodometric titrations, chlorine analysis, and redox reactions, particularly in environmental testing, pharmaceutical QC, and analytical chemistry.
Its excellent solubility in water and stability at ambient temperatures make it ideal for both laboratory and industrial settings.
Product Specifications
| Property | Value |
|---|---|
| Product Name | Sodium Thiosulphate Pentahydrate |
| Grade | AnalaR NORMAPUR®, ACS Analytical Reagent |
| Chemical Formula | Na₂S₂O₃·5H₂O |
| Molecular Weight | 248.19 g/mol |
| CAS Number | 10102-17-7 |
| MDL Number | MFCD00149186 |
| Merck Index | 12,08844 |
| EINECS Number | 231-867-5 |
| Melting Point | 48 °C |
| Density (20 °C) | 1.67 g/cm³ |
| Storage Temperature | Ambient |
| Physical Form | White crystalline solid |
| Assay | 99.5–100.5% |
Packaging Options
| Catalog Number | Pack Type | Pack Size |
|---|---|---|
| 27910.260 | Plastic bottle (solid) | 500 g |
| 27910.291 | Plastic bottle (solid) | 1 kg |
| 27910.460 | Plastic container | 25 kg |
Applications
- Iodometric titrations (e.g., for iodine, chlorine, bromine, and hydrogen peroxide)
- Residual chlorine analysis in water treatment
- Redox chemistry and volumetric analysis
- Photographic processing as a fixing agent
- Textile, leather, and pulp bleaching applications
- Dechlorination reagent in laboratory and industrial workflows
VWR Sodium Thiosulphate Pentahydrate 99.5–100.5%, AnalaR NORMAPUR® provides reliable, high-purity performance in titrimetric, redox, and industrial applications. Its compliance with ACS and Ph. Eur. standards ensures suitability for regulated laboratory and quality control environments, where consistency and traceability are essential.
- Pack Size: 1kg 500g Plastic bucket, 25kg