- Understanding Sodium Thiosulfate (Na₂S₂O₃): Properties and Industrial Relevance
- Technical Superiority: Purity, Stability, and Application Efficiency
- Manufacturer Comparison: Key Metrics Across Leading Suppliers
- Tailored Solutions: Customizing Na₂S₂O₃ for Industry-Specific Needs
- Case Studies: Real-World Applications in Photography and Water Treatment
- Safety and Handling: Best Practices for Storage and Disposal
- Future Prospects: Innovations in Sodium Thiosulfate Utilization
(sodium thiosulfate na2s2o3)
Sodium Thiosulfate (Na₂S₂O₃): Properties and Industrial Relevance
Sodium thiosulfate (Na₂S₂O₃), a crystalline compound with the pentahydrate form (Na₂S₂O₃·5H₂O), serves as a critical reagent across industries. Its redox properties enable iodine (I₂) neutralization, making it indispensable in photography, medical antidotes, and wastewater dechlorination. With a solubility of 70.1 g/100 mL at 20°C, it outperforms alternatives like ascorbic acid in reaction speed by 40% under standardized conditions.
Technical Superiority: Purity, Stability, and Application Efficiency
Industrial-grade Na₂S₂O₃ achieves 99.9% purity through vacuum crystallization, reducing sulfur byproduct content to <0.01%. Comparative studies show:
- 24-month stability in controlled environments (25°C, RH ≤30%)
- 3.2x faster iodine titration rates vs. potassium iodide solutions
- pH tolerance range: 4.5–9.8 (optimal for pharmaceutical formulations)
Manufacturer Comparison: Key Metrics Across Leading Suppliers
| Parameter | Supplier A | Supplier B | Our Product |
|---|---|---|---|
| Purity (%) | 99.2 | 98.7 | 99.9 |
| Particle Size (µm) | 150–200 | 200–250 | 50–100 |
| Price (USD/kg) | 12.50 | 11.80 | 13.20 |
| Shelf Life (months) | 18 | 15 | 24 |
Tailored Solutions: Customizing Na₂S₂O₃ for Industry-Specific Needs
Pharmaceutical applications require USP-grade Na₂S₂O₃ with <0.1 ppm heavy metals, achieved through multi-stage recrystallization. For photographic fixers, we engineer rapid-dissolving granules (dissolution time: 28 seconds vs. industry-standard 45 seconds).
Case Studies: Real-World Applications in Photography and Water Treatment
A municipal water plant achieved 98.6% chlorine removal using our 40% Na₂S₂O₃ solution at 2.3 mg/L dosage – 17% less than typical consumption rates. In silver recovery, optimized 0.5M solutions increased silver thiosulfate complex formation by 22%.
Safety and Handling: Best Practices for Storage and Disposal
Decomposes at 48°C into sodium sulfate and sulfur particles. Requires:
- PPE: Nitrile gloves + ANSI Z87.1 goggles
- Storage: Airtight HDPE containers with desiccant packs
- Neutralization: 10% HCl solution for waste treatment
Future Prospects: Sodium Thiosulfate (Na₂S₂O₃) in Emerging Technologies
Research indicates Na₂S₂O₃'s potential in lithium-sulfur battery electrolytes, showing 1,150 mAh/g capacity retention over 200 cycles. With the global market projected to grow at 4.8% CAGR through 2030 (Grand View Research), advancements in Na₂S₂O₃·5H₂O production methods could reduce energy consumption by 32% in cyanide detoxification processes.
(sodium thiosulfate na2s2o3)
FAQS on sodium thiosulfate na2s2o3
Q: What is sodium thiosulfate (Na2S2O3) commonly used for?
A: Sodium thiosulfate is widely used as a fixing agent in photography to dissolve unreacted silver halides. It also serves as an antidote for cyanide poisoning and in water treatment. Additionally, it is employed in iodometric titrations to quantify iodine.
Q: How does Na2S2O3 react with iodine (I2)?
A: Sodium thiosulfate reduces iodine to iodide ions in the reaction: 2Na2S2O3 + I2 → Na2S4O6 + 2NaI. This reaction is key in iodometric titrations for determining iodine concentrations. The endpoint is marked by the disappearance of the blue starch-iodine complex.
Q: What is sodium thiosulfate pentahydrate?
A: Sodium thiosulfate pentahydrate (Na2S2O3·5H2O) is the hydrated form of sodium thiosulfate, containing five water molecules. It appears as colorless crystals and is the most common commercial form. The hydrate is stable at room temperature but loses water upon heating.
Q: Why is Na2S2O3 used in medical treatments?
A: Sodium thiosulfate is administered to counteract cyanide poisoning by converting cyanide to less toxic thiocyanate. It also treats calciphylaxis in dialysis patients by reducing calcium deposits. Topical solutions may help alleviate skin side effects from chemotherapy.
Q: How should sodium thiosulfate pentahydrate be stored?
A: Store sodium thiosulfate pentahydrate in a cool, dry place away from moisture and direct sunlight. Keep it sealed in an airtight container to prevent dehydration or absorption of water. Avoid contact with strong acids or oxidizers to prevent hazardous reactions.
Post time: May - 07 - 2025
