Anhydrous & Pentahydrate Sodium Thiosulfate Na2S2O3
Anhydrous & Pentahydrate Sodium Thiosulfate Na2S2O3, featuring molecular weights 158.11 g/mol (anhydrous) and 248.18 g/mol (pentahydrate) with exceptional reducing characteristics, appearing as white crystalline powder with excellent water solubility, superior dechlorination properties, and exceptional chemical compatibility across diverse industrial applications, is a specialized high-performance inorganic salt with outstanding performance characteristics, enhanced processing efficiency, and superior functionality in water treatment dechlorination, photography processing, medical antidote applications, gold mining operations, textile processing, paper manufacturing, and specialized analytical chemistry. Anhydrous & Pentahydrate Sodium Thiosulfate Na2S2O3 is a high-performance reducing agent extensively used for chlorine neutralization, photographic fixing, medical treatments, and specialized industrial processes. Na2S2O3 is a high purity, highly soluble salt with excellent reducing capacity used for water dechlorination, photography development, medical emergency treatment, and gold extraction processes. The Global Sodium Thiosulfate Market size was valued at USD 245 Million in 2022 and is projected to reach USD 385 Million by 2030, growing at a CAGR of 5.8%, with modern high-performance applications expanding significantly for water treatment and medical industries. The compound exhibits exceptional reducing characteristics and provides superior neutralization properties making it ideal for dechlorination operations, photography processing, medical applications, and specialized chemical processes. Anhydrous & Pentahydrate Sodium Thiosulfate Na2S2O3 is specifically processed to provide enhanced dechlorination performance, improved processing efficiency, and superior results in applications requiring effective chlorine neutralization control, reliable reducing properties, controlled photographic development reactions, and medical-grade performance in water treatment, photography, medicine, and specialized applications. In addition to its reducing properties, it also has excellent chelating ability and controlled crystallization characteristics. The nature of Anhydrous & Pentahydrate Sodium Thiosulfate is chemically stable under normal conditions and highly soluble in water, making it function as one of the most versatile reducing chemicals available, being highly effective and providing excellent compatibility properties, delivering broad-spectrum industrial applications, effective chemical performance, excellent process compatibility under various conditions, and outstanding safety profile during handling and application. Anhydrous & Pentahydrate Sodium Thiosulfate Na2S2O3 represents one of the most essential and versatile reducing compounds in modern water treatment facilities, photography laboratories, medical facilities, and specialized industrial sectors, providing exceptional reducing properties, superior processing characteristics, excellent compatibility performance, and outstanding regulatory compliance during manufacturing and application, making it essential for water treatment operations, photography processing, medical applications, mining operations, and specialized processes requiring high-performance reducing chemistry and regulatory approval with international chemical and processing standards.
At Chemicals & Process Equipment Limited, we supply advanced Anhydrous & Pentahydrate Sodium Thiosulfate Na2S2O3 manufactured under stringent quality control standards and international chemical, pharmaceutical grade, photography grade, and industrial specifications. Our comprehensive product range includes various purity levels, different crystallization states, and specialized formulations meeting diverse requirements for water treatment operations, photography applications, medical facilities, gold mining, and specialized applications across global water treatment, photography, medical, and chemical markets.
✅ Advanced Reducing Technology – Optimized Performance & Processing Excellence
✅ Consistent Quality Standards – Multiple Product Classifications with Complete Documentation
✅ Essential Industrial Component – Superior Dechlorination Properties & Processing Compatibility
✅ Multi-Industry Applications – Water Treatment, Photography, Medical, Mining Industries
✅ Technical Support Package – Complete Application Guidance & Performance Optimization
The Global Water Treatment Chemicals Market is expected to grow from USD 28.4 Billion in 2023 to USD 42.8 Billion by 2030, with a CAGR of 6.0% during the forecast period (2024-2030). Market expansion is driven by increasing water quality requirements, growing photography industry needs, expanding medical applications, and rising specialty chemical demand across multiple sectors.
For comprehensive information about sodium thiosulfate applications in water treatment technology and industrial processing, this detailed technical resource from Noah Chemicals provides extensive coverage of sodium thiosulfate properties, unique performance characteristics, and optimization methods for modern chemical and industrial applications.
Technical Specifications & Properties
| Property | USP Grade | Photography Grade | Water Treatment Grade | Gold Mining Grade | Technical Grade | Industrial Grade |
|---|---|---|---|---|---|---|
| Na2S2O3 Content (%) | 99.0-100.5 | 98.0-99.5 | 95.0-98.0 | 92.0-97.0 | 88.0-95.0 | 80.0-92.0 |
| Purity (%) | 99.5-100.0 | 98.5-99.5 | 96.0-98.5 | 94.0-97.5 | 90.0-96.0 | 85.0-92.0 |
| Particle Size (μm) | 50-300 | 100-500 | 200-1000 | 500-2000 | 1000-3000 | 2000-5000 |
| Solubility (g/100mL H2O) | 70.1 | 69.8 | 68.5 | 67.0 | 65.0 | 60.0 |
| Bulk Density (g/cm³) | 1.0-1.4 | 1.2-1.6 | 1.4-1.8 | 1.6-2.0 | 1.8-2.3 | 2.0-2.8 |
| Moisture Content (%) | <0.2 | <0.5 | <1.0 | <2.0 | <3.0 | <5.0 |
| pH (5% solution) | 6.5-8.5 | 6.0-8.0 | 5.5-8.5 | 5.0-9.0 | 4.5-9.5 | 4.0-10.0 |
| Melting Point (°C) | 48 | 48 | 47 | 46 | 45 | 43 |
| Decomposition Temp (°C) | 100 | 100 | 98 | 95 | 90 | 85 |
| Iron (Fe) Content (ppm) | <5 | <20 | <50 | <100 | <200 | <500 |
| Heavy Metals (ppm) | <5 | <10 | <20 | <50 | <100 | <200 |
| Chloride (Cl) Content (%) | <0.01 | <0.02 | <0.05 | <0.1 | <0.2 | <0.5 |
| Sulfate (SO4) Content (%) | <0.05 | <0.1 | <0.2 | <0.5 | <1.0 | <2.0 |
| Carbonate (CO3) Content (%) | <0.01 | <0.02 | <0.05 | <0.1 | <0.2 | <0.5 |
| Calcium (Ca) Content (%) | <0.02 | <0.05 | <0.1 | <0.2 | <0.5 | <1.0 |
| Magnesium (Mg) Content (%) | <0.02 | <0.05 | <0.1 | <0.2 | <0.5 | <1.0 |
| Lead (Pb) Content (ppm) | <2 | <5 | <10 | <20 | <50 | <100 |
| Arsenic (As) Content (ppm) | <1 | <2 | <5 | <10 | <20 | <50 |
| Mercury (Hg) Content (ppm) | <0.1 | <0.5 | <1 | <2 | <5 | <10 |
| Insoluble Matter (%) | <0.005 | <0.01 | <0.02 | <0.05 | <0.1 | <0.2 |
| Reducing Power (%) | 99.5-100.5 | 98.5-99.5 | 96.0-99.0 | 94.0-98.0 | 90.0-96.0 | 85.0-92.0 |
| Color | White | White | White/Off-white | White/Cream | Cream/White | Variable |
| Crystal Structure | Monoclinic | Monoclinic | Monoclinic | Mixed | Mixed | Mixed |
| Appearance | Fine Crystals | Crystals | Crystalline | Granular | Powder/Granular | Variable |
| Hygroscopicity | Moderate | Moderate | Moderate | Low | Low | Variable |
| Flowability | Excellent | Good | Good | Fair | Fair | Variable |
| Caking Tendency | Very Low | Low | Low | Moderate | Moderate | High |
| Storage Life (months) | 36 | 24 | 18 | 15 | 12 | 10 |
| Storage Temperature (°C) | 15-25 | 10-30 | 5-35 | 0-40 | 0-45 | 0-50 |
| Relative Humidity Limit (%) | <60 | <65 | <70 | <75 | <80 | <85 |
| Light Sensitivity | Low | Moderate | Low | Low | Low | Low |
| Environmental Impact | Very Low | Low | Low | Low | Moderate | Moderate |
| Biodegradability | Good | Good | Good | Good | Good | Fair |
| Toxicity Level | Very Low | Very Low | Low | Low | Low | Moderate |
| Packaging | 500g Bottles | 25kg Bags | 50kg Bags | 500kg Bags | 1000kg Totes | Bulk Trucks |
| Regulatory Status | USP/EP | Photography | Water Treatment | Mining | Technical | Industrial |
Available Product Types:
- USP Grade for pharmaceutical applications and medical treatments
- Photography Grade for film development and photographic processing
- Water Treatment Grade for dechlorination and water purification
- Gold Mining Grade for precious metal extraction and hydrometallurgy
- Analytical Grade for laboratory analysis and chemical testing
- Technical Grade for industrial processing and chemical synthesis
- Food Grade for food processing and preservation applications
- Aquaculture Grade for fish farming and aquatic system treatment
- Textile Grade for bleaching and dyeing operations
- Paper Grade for pulp processing and paper manufacturing
- Leather Grade for tanning processes and hide treatment
- Research Grade for scientific studies and development applications
- Electronics Grade for circuit board manufacturing and cleaning
- Custom Specifications for unique processing requirements
- High Purity Grade for specialized research and pharmaceutical uses
Specialized Application Solutions:
- Water treatment system design and dechlorination optimization services
- Photography processing consultation and darkroom setup assistance
- Medical formulation development and pharmaceutical enhancement
- Gold mining process optimization and extraction improvement
- Quality control method development and analytical procedures
- Regulatory compliance assistance and safety assessment
- Custom thiosulfate development and performance testing services
- Technical consultation and process optimization
- Environmental impact consulting and sustainable practices
Water Treatment & Dechlorination Applications
Municipal Water Systems Water treatment facilities utilize Water Treatment Grade Sodium Thiosulfate Na2S2O3 as premium dechlorination agent for chlorine neutralization, water safety, and treatment enhancement. Water treatment specialists employing Na2S2O3 for enhanced chlorine removal, effective water purification, and safety optimization providing superior water quality, excellent treatment performance, and outstanding public safety with complete water treatment optimization.
Industrial Water Processing Industrial water companies use specialized Sodium Thiosulfate formulations for process water dechlorination, cooling systems, and industrial enhancement. Industrial water engineers employ Na2S2O3 for enhanced water quality, improved system protection, and processing optimization providing improved industrial water safety, enhanced equipment protection, and superior industrial water treatment performance.
Swimming Pool Treatment Pool service companies utilize Sodium Thiosulfate for chlorine neutralization, water balancing, and pool enhancement. Pool maintenance specialists employ Na2S2O3 for enhanced water safety, improved swimmer comfort, and pool optimization providing exceptional pool water results, enhanced swimmer protection, and outstanding pool maintenance operation.
Aquaculture Systems Fish farming operations use Water Treatment Grade Sodium Thiosulfate for aquarium dechlorination, fish safety, and aquatic enhancement. Aquaculture specialists employ Na2S2O3 for enhanced fish health, improved water conditions, and aquaculture optimization providing exceptional aquatic results, enhanced fish welfare, and superior aquaculture performance.
Photography & Film Processing Applications
Film Development Photography laboratories utilize Photography Grade Sodium Thiosulfate Na2S2O3 for film fixing, image development, and photography enhancement. Photography technicians employ Na2S2O3 for enhanced image quality, improved film processing, and darkroom optimization providing superior photographic products, enhanced image clarity, and outstanding photography manufacturing results.
Photo Processing Photo finishing companies use specialized Sodium Thiosulfate for print development, image enhancement, and photo improvement. Photo processing specialists employ Na2S2O3 for enhanced print quality, improved image stability, and processing optimization providing exceptional photo results, enhanced image permanence, and superior photo processing excellence.
X-Ray Processing Medical imaging facilities utilize Sodium Thiosulfate for X-ray film development, medical imaging, and diagnostic enhancement. Medical imaging engineers employ Na2S2O3 for enhanced image clarity, improved diagnostic quality, and imaging optimization providing superior medical imaging, enhanced diagnostic accuracy, and outstanding medical imaging manufacturing results.
Darkroom Applications Photography studios use Photography Grade Sodium Thiosulfate for darkroom processing, chemical development, and studio enhancement. Photography specialists employ Na2S2O3 for enhanced chemical processing, improved workflow efficiency, and studio optimization providing exceptional photography results, enhanced image production, and superior photography manufacturing performance.
Medical & Pharmaceutical Applications
Antidote Treatment Healthcare facilities utilize USP Grade Sodium Thiosulfate Na2S2O3 for cyanide poisoning treatment, emergency medicine, and medical enhancement. Medical professionals employ Na2S2O3 for enhanced antidote effectiveness, improved patient outcomes, and treatment optimization providing superior medical care, enhanced emergency response, and outstanding medical treatment results.
Pharmaceutical Manufacturing Pharmaceutical companies use specialized Sodium Thiosulfate for drug formulations, active ingredients, and pharmaceutical enhancement. Pharmaceutical specialists employ Na2S2O3 for enhanced drug stability, improved therapeutic efficacy, and manufacturing optimization providing exceptional pharmaceutical results, enhanced drug quality, and superior pharmaceutical manufacturing excellence.
Topical Applications Medical device manufacturers utilize Sodium Thiosulfate for skin treatments, dermatological applications, and healthcare enhancement. Dermatology specialists employ Na2S2O3 for enhanced skin therapy, improved treatment effectiveness, and medical optimization providing superior dermatological products, enhanced patient care, and outstanding medical manufacturing results.
Research Medicine Medical research institutions use USP Grade Sodium Thiosulfate for clinical studies, medical research, and healthcare enhancement. Medical researchers employ Na2S2O3 for enhanced research accuracy, improved clinical outcomes, and research optimization providing exceptional medical research results, enhanced scientific discovery, and superior medical research performance.
Mining & Metallurgy Applications
Gold Extraction Gold mining companies utilize Gold Mining Grade Sodium Thiosulfate Na2S2O3 for precious metal leaching, gold recovery, and mining enhancement. Mining engineers employ Na2S2O3 for enhanced gold extraction, improved recovery rates, and mining optimization providing superior gold production, enhanced extraction efficiency, and outstanding mining manufacturing results.
Silver Recovery Silver processing facilities use specialized Sodium Thiosulfate for silver leaching, precious metal recovery, and metallurgical enhancement. Metallurgy specialists employ Na2S2O3 for enhanced silver extraction, improved metal purity, and processing optimization providing exceptional silver recovery results, enhanced precious metal quality, and superior metallurgical manufacturing excellence.
Metal Processing Metal processing companies utilize Sodium Thiosulfate for metal cleaning, surface treatment, and processing enhancement. Metal processing engineers employ Na2S2O3 for enhanced metal surface quality, improved processing efficiency, and metal optimization providing superior metal products, enhanced surface finish, and outstanding metal processing manufacturing results.
Hydrometallurgy Hydrometallurgical facilities use Technical Grade Sodium Thiosulfate for metal extraction, solution processing, and metallurgical enhancement. Hydrometallurgy specialists employ Na2S2O3 for enhanced metal recovery, improved solution chemistry, and processing optimization providing exceptional metallurgical results, enhanced metal extraction, and superior hydrometallurgical manufacturing performance.
Textile & Paper Applications
Textile Processing Textile manufacturers utilize Textile Grade Sodium Thiosulfate Na2S2O3 for bleaching neutralization, fabric treatment, and textile enhancement. Textile engineers employ Na2S2O3 for enhanced fabric quality, improved color stability, and processing optimization providing superior textile products, enhanced fabric properties, and outstanding textile manufacturing results.
Paper Manufacturing Paper companies use specialized Sodium Thiosulfate for pulp bleaching control, paper processing, and manufacturing enhancement. Paper processing specialists employ Na2S2O3 for enhanced paper quality, improved bleaching efficiency, and production optimization providing exceptional paper results, enhanced product quality, and superior paper manufacturing excellence.
Dyeing Operations Dyeing facilities utilize Sodium Thiosulfate for dye bath treatment, color enhancement, and dyeing improvement. Dyeing engineers employ Na2S2O3 for enhanced color fastness, improved dye uptake, and dyeing optimization providing superior dyeing results, enhanced color quality, and outstanding dyeing manufacturing results.
Printing Applications Printing companies use Textile Grade Sodium Thiosulfate for ink processing, print enhancement, and printing improvement. Printing specialists employ Na2S2O3 for enhanced print quality, improved ink stability, and printing optimization providing exceptional printing results, enhanced image reproduction, and superior printing manufacturing performance.
Analytical & Laboratory Applications
Chemical Analysis Analytical laboratories utilize Analytical Grade Sodium Thiosulfate Na2S2O3 for iodometric titrations, analytical chemistry, and testing enhancement. Laboratory technicians employ Na2S2O3 for enhanced analytical accuracy, improved test reliability, and laboratory optimization providing superior analytical results, enhanced testing quality, and outstanding laboratory manufacturing results.
Research Applications Research institutions use specialized Sodium Thiosulfate for scientific studies, chemical research, and research enhancement. Research scientists employ Na2S2O3 for enhanced experimental precision, improved research outcomes, and analytical optimization providing exceptional research results, enhanced scientific quality, and superior research manufacturing excellence.
Quality Control Quality control laboratories utilize Sodium Thiosulfate for product testing, quality assurance, and testing enhancement. QC specialists employ Na2S2O3 for enhanced testing accuracy, improved quality verification, and laboratory optimization providing superior quality control, enhanced product safety, and outstanding quality manufacturing results.
Educational Applications Educational institutions use Analytical Grade Sodium Thiosulfate for chemistry education, student experiments, and educational enhancement. Chemistry educators employ Na2S2O3 for enhanced learning experiences, improved educational outcomes, and teaching optimization providing exceptional educational results, enhanced student understanding, and superior educational performance.
Food & Agriculture Applications
Food Processing Food manufacturers utilize Food Grade Sodium Thiosulfate Na2S2O3 for food preservation, antioxidant applications, and food enhancement. Food technologists employ Na2S2O3 for enhanced food safety, improved preservation efficiency, and processing optimization providing superior food products, enhanced food quality, and outstanding food manufacturing results.
Agricultural Applications Agricultural companies use specialized Sodium Thiosulfate for soil treatment, plant nutrition, and agricultural enhancement. Agricultural specialists employ Na2S2O3 for enhanced soil conditions, improved plant health, and farming optimization providing exceptional agricultural results, enhanced crop performance, and superior agricultural manufacturing excellence.
Aquaculture Treatment Aquaculture facilities utilize Sodium Thiosulfate for fish farming, water conditioning, and aquaculture enhancement. Aquaculture engineers employ Na2S2O3 for enhanced fish health, improved water quality, and aquaculture optimization providing superior aquaculture products, enhanced fish production, and outstanding aquaculture manufacturing results.
Veterinary Applications Veterinary medicine companies use USP Grade Sodium Thiosulfate for animal treatments, veterinary care, and animal health enhancement. Veterinary specialists employ Na2S2O3 for enhanced animal therapy, improved veterinary outcomes, and treatment optimization providing exceptional veterinary results, enhanced animal welfare, and superior veterinary manufacturing performance.
Specialized Processing
Chemical Manufacturing Chemical companies utilize Technical Grade Sodium Thiosulfate Na2S2O3 for chemical synthesis, reducing reactions, and manufacturing enhancement. Chemical engineers employ Na2S2O3 for enhanced reaction control, improved product quality, and manufacturing optimization providing superior chemical products, enhanced processing quality, and outstanding chemical manufacturing results.
Electronics Cleaning Electronics manufacturers use specialized Sodium Thiosulfate for circuit cleaning, component processing, and electronics enhancement. Electronics specialists employ Na2S2O3 for enhanced cleaning efficiency, improved component quality, and electronics optimization providing exceptional electronics results, enhanced product reliability, and superior electronics manufacturing excellence.
Environmental Remediation Environmental companies utilize Sodium Thiosulfate for soil treatment, groundwater remediation, and environmental enhancement. Environmental engineers employ Na2S2O3 for enhanced contaminant removal, improved environmental restoration, and remediation optimization providing superior environmental results, enhanced ecosystem protection, and outstanding environmental manufacturing results.
Pharmaceutical Synthesis Pharmaceutical manufacturers use Technical Grade Sodium Thiosulfate for drug synthesis, intermediate production, and pharmaceutical enhancement. Pharmaceutical specialists employ Na2S2O3 for enhanced synthesis efficiency, improved pharmaceutical quality, and manufacturing optimization providing exceptional pharmaceutical results, enhanced drug development, and superior pharmaceutical manufacturing performance.
Quality Control & Testing
Comprehensive Quality Assurance Every production batch undergoes extensive testing to ensure compliance with Sodium Thiosulfate standards, pharmaceutical requirements, photography specifications, and international quality standards. Our quality control laboratory employs advanced analytical techniques including chemical composition analysis, purity determination, and comprehensive performance evaluation.
Quality assurance procedures include:
- Na2S2O3 content determination using iodometric titration
- Purity assessment using gravimetric analysis
- Particle size analysis using sieve analysis methods
- Solubility testing using standard dissolution procedures
- Moisture content analysis using Karl Fischer titration
- pH measurement using calibrated electrode systems
- Reducing power testing using standardized methods
- Heavy metals analysis using ICP-MS spectroscopy
- Microbiological testing for USP and food grades
- Chloride content analysis using argentometric titration
- Sulfate analysis using turbidimetric methods
- Iron content analysis using spectrophotometric methods
- Thermal analysis using DSC and TGA methods
- X-ray diffraction for crystal structure confirmation
- Packaging integrity testing using standard procedures
Storage & Handling Procedures Implement proper storage conditions including temperature control, protection from oxidizing agents, appropriate container materials, segregation from acids and strong oxidizers, and comprehensive safety procedures for maintaining Sodium Thiosulfate quality and ensuring safe handling throughout storage and application periods.
Environmental & Regulatory Compliance
Pharmaceutical Standards USP Grade Sodium Thiosulfate complies with USP, EP, and international pharmaceutical standards ensuring safe use in medical applications with established pharmaceutical safety protocols and comprehensive safety assessments for medical manufacturing operations.
Photography Standards Photography Grade products adhere to ANSI, ISO, and international photography requirements ensuring appropriate use in photographic applications with established photography safety protocols and regulatory compliance for photography processing operations.
Water Treatment Standards Water Treatment Grade products meet EPA, NSF, and international water treatment requirements ensuring proper use in water applications with established water safety protocols and performance standards for municipal operations.
Environmental Safety Sodium Thiosulfate demonstrates low environmental impact with biodegradable properties, responsible usage guidelines, and environmental management procedures ensuring sustainable operations with comprehensive environmental safety measures and chemical management protocols.
Performance Advantages & Benefits
✔ Premium Reducing Component – Superior chemical reactivity and manufacturing performance
✔ Outstanding Medical Quality – Excellent antidote properties and pharmaceutical applications
✔ Water Treatment Excellence – Exceptional dechlorination properties and water safety
✔ Photography Proven – Superior fixing properties and image development applications
✔ Multiple Applications – Suitable for medical, photography, water treatment, and mining processing
✔ Processing Excellence – Superior reducing properties and manufacturing compatibility
✔ Quality Consistency – Uniform performance across production batches
✔ Safety Profile – Proven safety and handling characteristics with proper protocols
✔ Environmental Management – Low environmental impact with biodegradable properties
✔ Regulatory Compliance – Approved for pharmaceutical, photography, water treatment, and food applications
✔ Cost Effectiveness – Economic solution with superior performance characteristics
✔ Reducing Properties – Exceptional chemical reduction and neutralization characteristics
✔ Global Availability – Reliable supply chains and worldwide distribution networks
✔ Technical Versatility – Multiple grade options and processing compatibility
✔ Technical Support – Complete application guidance and optimization services
Our Anhydrous & Pentahydrate Sodium Thiosulfate Na2S2O3 products represent industry-leading standards in inorganic salt and reducing agent manufacturing technology, specifically manufactured for demanding medical applications, photography processing operations, water treatment projects, and specialized chemical processing requiring exceptional reducing properties, reliable performance, and comprehensive regulatory compliance. We provide complete technical support, application guidance, and performance consultation to ensure optimal results across your specialized medical, photography, water treatment, or industrial applications.
For detailed specifications, technical data sheets, or application-specific recommendations, contact our specialized Sodium Thiosulfate division. We offer complete support including product selection, application optimization, performance testing, regulatory guidance, quality assurance, and technical assistance to maximize effectiveness in your medical, photography, water treatment, or industrial applications.
For more information about our products, feel free to Contact Us today.












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