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Sodium Thiosulfate (Hypo) Pentahydrate - Photographic Fixer, Water Dechlorinator, and Cyanide Antidote for Industrial and Medical Use
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Sodium Thiosulfate (Hypo) Pentahydrate - Photographic Fixer, Water Dechlorinator, and Cyanide Antidote for Industrial and Medical Use
| MOQ: | 10Tons |
| Price: | Please contact customer service |
| Standard Packaging: | Bagged and ton bags |
| Delivery Period: | About six weeks |
| Payment Method: | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Capacity: | 100,000 tons per year |
Detail Information
Place of Origin
China
Brand Name
SiChun HongJian
Model Number
Sodium thiosulfate
Document
Chemical Formula:
Na2S2O3
CAS Login Number:
7772-98-7
EINECS Login Number:
231-867-5
Density:
1.667 G/cm³
Appearance:
White Crystalline Powder
Security Description:
S23；S24/25；S26；S36
Hazard Description:
R36/37/38
Highlight:
Photographic Fixer Sodium Thiosulfate
,Water Dechlorinator Hypo
,Cyanide Antidote Na₂S₂O₃·5H₂O
Product Description
Sodium Thiosulfate (Hypo) Pentahydrate
Sodium thiosulfate, commonly known as "hypo," typically exists as the pentahydrate (Na₂S₂O₃·5H₂O). This product appears as colorless transparent crystals or white crystalline powder, odorless with a saline taste. Its core chemical property lies in its role as a gentle yet highly effective reducing agent and complexing agent, capable of forming stable, soluble complexes with various metal ions, particularly silver, cyanide, and chlorine.
Core Applications
Photographic Fixing Agent
Sodium thiosulfate serves as the fundamental fixing agent in photography and imaging industries:
- Traditional Darkroom Processing: Reacts with unexposed silver halide to form stable, water-soluble complexes, permanently fixing images
- Professional Film Processing: Used in motion picture film and medical X-ray film development
- Provides the chemical foundation for century-long preservation of silver halide images
Water Treatment & Environmental Protection
Essential for water purification and environmental safety applications:
- Residual Chlorine Neutralization: Rapidly neutralizes free chlorine, chloramines, and dissolved oxygen in water systems
- RO Membrane Protection: Critical pretreatment step to protect Reverse Osmosis membranes from oxidative chlorine damage
- Cyanide Waste Treatment: Converts toxic free cyanide to less toxic thiocyanate under alkaline conditions
Medical Emergency Applications
Life-saving applications in clinical and safety fields:
- Cyanide Poisoning Antidote: Key component in combination therapy, converting cyanide ions to non-toxic thiocyanate
- Heavy Metal Poisoning: Adjunctive therapy for arsenic, bismuth, and mercury poisoning
- Must be administered intravenously under medical supervision
Industrial & Chemical Applications
Versatile applications across multiple industries:
- Gold Extraction: Environmentally friendly non-cyanide gold leaching agent for refractory ores
- Chemical Analysis: Standard reducing agent in iodometric titration for oxidizing substances
- Textile & Leather: Antichlor agent after bleaching processes and reducing agent
Product Specifications
| Grade | Primary Applications | Key Quality Parameters |
|---|---|---|
| Industrial Grade | Water treatment, mining, general industrial use | Standard purity, cost-effective |
| Photographic Grade | Film processing, imaging | High purity, stringent impurity limits |
| Reagent Grade | Laboratory analysis, chemical research | Analytical purity, precise composition |
| Pharmaceutical Grade | Medical applications, antidote preparation | Highest purity, strict heavy metal limits |
Safety & Handling Information
Stability: Dry crystals are stable. Aqueous solutions decompose under acidic conditions, producing sulfur precipitate and sulfur dioxide gas.
Medical Use: For antidotal applications, must be administered intravenously under professional medical guidance only.
Storage: Keep sealed in cool, dry conditions to prevent efflorescence or deliquescence.
Product Features & Support
Our sodium thiosulfate pentahydrate features high purity, intact crystals, rapid dissolution, and clear solutions. We supply various specifications to photographic chemical manufacturers, water treatment companies, pharmaceutical enterprises, gold refineries, chemical plants, and laboratories.
Professional technical support available for fixing bath formulation, dechlorination process design, and antidote preparation applications.
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