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VWR Sodium thiosulphate pentahydrate ≥99%, GPR RECTAPUR®
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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 (≥99%), supplied under the GPR RECTAPUR® grade, is a high-purity analytical reagent widely used in iodometric titrations, water treatment, photography, and chemical analysis.
With stringent quality control (chloride ≤100 ppm, iron ≤10 ppm, heavy metals ≤20 ppm), this product ensures reproducible analytical performance in regulated and research laboratories. Sodium thiosulphate is a well-known reducing agent and plays a critical role in analytical redox chemistry, particularly in the determination of halogens, iodine, and dissolved oxygen.
Key Features
- High Purity: Assay ≥99%.
- GPR RECTAPUR® Grade: Ensures reliable analytical performance.
- Controlled Impurities: Low levels of heavy metals, chloride, and iron.
- Versatile Reducing Agent: Suitable for a wide range of analytical and industrial uses.
- Stable Hydrated Form: Commonly used crystalline pentahydrate.
Applications
- Analytical Chemistry: Standard reagent in iodometric titrations.
- Environmental Testing: Determination of dissolved oxygen in water (Winkler method).
- Industrial Use: Fixing agent in photography and textile processing.
- Water Treatment: Dechlorination of water supplies.
- Educational Laboratories: Common redox reagent for teaching experiments.
Specifications
| Property | Details |
|---|---|
| Assay (Purity) | ≥99% |
| CAS Number | 10102-17-7 |
| Molecular Formula | Na₂S₂O₃·5H₂O |
| Molecular Weight | 248.19 g/mol |
| Appearance | White crystalline solid |
| Melting Point | 48 °C |
| Density (20 °C) | 1.67 g/cm³ |
| Heavy Metals (as Pb) | ≤20 ppm |
| Chloride (Cl⁻) | ≤100 ppm |
| Iron (Fe) | ≤10 ppm |
| Storage Temperature | Ambient |
| Merck Index | 12,08844 |
Packaging & Ordering Information
| Catalog Number | Description | Pack Size | Container |
|---|---|---|---|
| 27909.296 | VWR® Sodium Thiosulphate Pentahydrate ≥99%, GPR RECTAPUR® | 1 kg | Plastic bottle |
| 27909.365 | VWR® Sodium Thiosulphate Pentahydrate ≥99%, GPR RECTAPUR® | 5 kg | Plastic bottle |
| 27909.460 | VWR® Sodium Thiosulphate Pentahydrate ≥99%, GPR RECTAPUR® | 25 kg | Plastic bucket |
Safety Information
- Hazards: Generally low toxicity but may decompose on heating to release sulphur oxides.
- Precautions: Handle with standard laboratory PPE (gloves, goggles, lab coat). Store in tightly closed containers in a dry place.
VWR® Sodium Thiosulphate Pentahydrate ≥99%, GPR RECTAPUR® is a high-purity reducing agent widely used in iodometric titrations, environmental testing, water treatment, and industrial applications. With controlled impurity levels and consistent quality, it is a reliable choice for laboratories and production facilities.
- Pack Size: 1kg Plastic bucket, 25kg Plastic bottle, 5kg