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Product Name: Sodium Thiosulfate Pentahydrate
Alias: Hypo
CAS Number: 10102-17-7
Molecular Formula: Na₂S₂O₃·5H₂O
Product Category: Inorganic Salts / Reducing Agents / Water Treatment Chemicals
Sodium thiosulfate pentahydrate (CAS 10102-17-7), commonly known as "hypo," is a commonly used inorganic reducing and complexing agent with excellent water solubility and chemical stability. This product is widely used in photographic fixing, water treatment, chemical synthesis, pharmaceuticals, textiles, and analytical chemistry, and is one of the most frequently used basic chemicals in industry and laboratories.
Due to its high safety, stable price, and wide range of applications, sodium thiosulfate pentahydrate has long been a key auxiliary raw material in many industries.
| Parameter | Value |
|---|---|
| Product Name | Sodium Thiosulfate Pentahydrate |
| CAS Number | 10102-17-7 |
| Molecular Formula | Na2S2O3·5H2O |
| Molecular Weight | 248.18 g/mol |
| Appearance | Colorless transparent crystals |
| Solubility | Freely soluble in water |
| pH (10% solution) | 6.0–8.0 |
| Assay | ≥99.0% |
| Loss on Drying | 36–38% |
1️⃣ Photography and Image Processing
Traditional photographic fixers
Silver halide complexation and removal
2️⃣ Water Treatment and Environmental Protection
Residual chlorine removal agents
Industrial wastewater treatment reducing agents
3️⃣ Chemical and Industrial Applications
Chemical reducing agents
Electroplating and metal surface treatment
4️⃣ Pharmaceuticals and Laboratories
Pharmaceutical-grade intermediates
Analytical reagents and laboratory reagents
✔ High purity (≥99.0%), low impurities
✔ Fast dissolution, easy to use
✔ Good chemical stability, safe storage
✔ Suitable for industrial and reagent-grade needs
✔ Long-term stable supply
🔹 Mature supply system for inorganic salt products
🔹 Strict quality and batch control
🔹 Provides COA/MSDS/TDS
🔹 Supports customized particle size and packaging
🔹 Extensive experience in global logistics and export
| Item | Details |
|---|---|
| Packaging | 25 kg bag / 50 kg bag |
| Storage | Cool, dry and ventilated place |
| Transportation | Non-dangerous goods |
| Shelf Life | 24 months |
Q1: What is sodium thiosulfate pentahydrate used for?
A: It is used as a reducing agent, photographic fixer and chlorine neutralizer.
Q2: Is sodium thiosulfate soluble in water?
A: Yes, it is freely soluble in water.
Q3: Is this product hazardous?
A: No, it is classified as non-hazardous under normal transportation conditions.
Q4: What grades are available?
A: Industrial grade, photographic grade and reagent grade are available.
Q5: Can you provide quality documents?
A: Yes, COA, MSDS and technical data sheets are available.
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