Sodium Thiosulphate Pentahydrate Crystals
Analytical Premium
Specialty Chemical

Sodium Thiosulphate Pentahydrate - Na₂S₂O₃·5H₂O (99%+)

Premium grade sodium thiosulphate pentahydrate engineered for demanding analytical, photographic, and industrial applications. Our high-purity crystals deliver exceptional performance in water treatment, textile processing, photography development, and analytical chemistry requiring precise stoichiometry and reliable results.

  • 99%+ Purity (Anhydrous Basis)
  • Pharmaceutical Grade Available
  • Superior Crystal Quality
  • Low Heavy Metal Content
  • Multiple Packaging Options
  • Complete Analysis Certificate
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Technical Specifications

Chemical Formula: Na₂S₂O₃·5H₂O
CAS Number: 10102-17-7
EINECS Number: 231-867-5
Molecular Weight: 248.18 g/mol
Purity (anhydrous basis): 99.0% minimum
Physical State: White crystalline powder/granules
Crystal System: Monoclinic
Bulk Density: 1.0-1.2 g/cm³
Solubility (20°C): 70.1 g/100ml water
pH (5% solution): 6.5-8.5
Water Content: 36.0-37.0% (theoretical 36.3%)
Insoluble Matter: ≤ 0.005%
Chloride (as Cl): ≤ 0.01%
Sulfate (as SO₄): ≤ 0.2%
Iron (Fe): ≤ 2 ppm
Heavy Metals (as Pb): ≤ 5 ppm
Arsenic (As): ≤ 1 ppm
Packaging Options: 25kg bags, 50kg drums, 1000kg bulk bags

Applications

Photography & Film Processing
Water Treatment & Dechlorination
Textile Bleaching & Processing
Analytical Chemistry & Titrations
Pharmaceutical Manufacturing
Metal Extraction & Recovery
Paper & Pulp Industry
Laboratory Reagent
Dye & Pigment Production
Gold & Silver Recovery
Neutralization Reactions
Research & Development

Industry-Specific Grades

DRAVYOM offers specialized sodium thiosulphate grades tailored for specific industry requirements, ensuring optimal performance and regulatory compliance across diverse analytical and industrial applications.

Analytical Reagent (AR)
Purity: 99.5% minimum Heavy Metals: ≤ 2 ppm Iron: ≤ 1 ppm Application: Analytical chemistry, titrations
Pharmaceutical Grade (USP)
Purity: 99.0% minimum (USP) Arsenic: ≤ 0.5 ppm Lead: ≤ 2 ppm Application: Pharmaceutical manufacturing
Photography Grade
Purity: 99.0% minimum Chloride: ≤ 0.005% Iron: ≤ 1 ppm Application: Film processing, photo chemicals
Technical Grade
Purity: 98.0% minimum Cost-effective solution Bulk quantities available Application: Water treatment, industrial use

Quality Standards

DRAVYOM's Sodium Thiosulphate Pentahydrate is manufactured under stringent quality control protocols, meeting international pharmaceutical and analytical standards including USP, BP, EP, and various national pharmacopoeias.

ISO 9001:2015 Quality Management
USP/BP/EP Pharmacopoeia Compliant
99%+ Purity Guaranteed
Advanced Analytical Testing
Heavy Metal Controlled
Climate-Controlled Storage
Complete Certificate of Analysis
Moisture-Protected Packaging

Advanced Chemical Properties & Performance

DRAVYOM's Sodium Thiosulphate Pentahydrate exhibits exceptional chemical properties that make it ideal for demanding analytical and industrial applications. The controlled crystal structure ensures consistent performance and reliable results.

Reducing Properties
Reduction Potential: Strong reducing agent
Iodine Titration: 1 mol = 1 mol I₂
Chlorine Neutralization: Rapid and complete
Thermal Properties
Melting Point: 48°C (pentahydrate)
Dehydration Temperature: 45-50°C (loses water)
Decomposition: >100°C (forms sulfite)
Solubility Characteristics
Water Solubility (20°C): 70.1 g/100ml
Dissolution Rate: Very rapid
Solution Stability: Stable in neutral/alkaline pH
Crystal Properties
Crystal System: Monoclinic
Particle Size: Customizable (mesh sizes)
Flowability: Excellent (free-flowing)

Performance Characteristics

Our Sodium Thiosulphate Pentahydrate delivers consistent, reliable performance across diverse applications, with optimized purity levels and crystal structure for maximum analytical accuracy and industrial efficiency.

Analytical Accuracy

±0.05% titration endpoint precision

Superior analytical performance
Dechlorination Rate

Instantaneous - Complete chlorine neutralization

Immediate chemical response
Crystal Stability

Excellent - Maintains hydration under proper storage

Outstanding structural integrity
Shelf Life

60 months under proper storage conditions

Extended product lifecycle

Safety Information

Sodium thiosulphate pentahydrate is generally considered safe with low toxicity profile. Standard laboratory safety practices should be followed to ensure safe handling and storage. May cause mild eye irritation in powder form and dust inhalation should be avoided with adequate ventilation.

GRAS Status
Eye Irritant (dust)
Dust Inhalation
Non-toxic

Storage & Handling

Proper storage and handling of sodium thiosulphate pentahydrate is essential to maintain crystal integrity and prevent dehydration. Follow established procedures to preserve product quality and analytical accuracy.

Temperature: 15-25°C (59-77°F)
Relative humidity: < 60%
Protect from direct sunlight and heat
Store in original sealed containers
Use moisture-proof containers with tight seals
PE-lined drums or moisture barrier bags
Use clean, dry scoops and transfer equipment
Avoid contamination with oxidizing agents

Chemical Mechanisms & Reaction Pathways

Sodium thiosulphate pentahydrate exhibits unique chemical reactivity through its thiosulfate functional group, enabling diverse analytical and industrial applications with exceptional selectivity and quantitative stoichiometry.

Iodometric Titrations

2Na₂S₂O₃ + I₂ → Na₂S₄O₆ + 2NaI - Quantitative reduction reaction

Precise analytical determination with sharp endpoints
Dechlorination Mechanisms

Na₂S₂O₃ + 4Cl₂ + 5H₂O → 2NaHSO₄ + 8HCl - Rapid chlorine neutralization

Essential for water treatment applications
Metal Complexation

AgBr + 2Na₂S₂O₃ → Na₃[Ag(S₂O₃)₂] + NaBr - Stable complex formation

Valuable in photography and metal extraction
Thermal Decomposition

4Na₂S₂O₃ → 3Na₂SO₄ + Na₂S + 4SO₂ - High temperature breakdown

Important for process optimization

Regulatory Compliance & Documentation

Comprehensive regulatory compliance ensures global market access with complete documentation packages supporting international trade and pharmaceutical application approval processes.

USP Standards

United States Pharmacopeia grade specifications

Pharmacopeia Compliance

BP, EP, JP, and IP pharmaceutical standards

ACS Reagent Grade

American Chemical Society analytical specifications

ISO Standards

International analytical and testing method standards

ASTM Methods

Standard testing procedures and analytical methods

SDS Documentation

Multi-language Safety Data Sheets (16 sections, GHS compliant)

Technical Support & Value-Added Services

DRAVYOM provides comprehensive technical support and value-added services to optimize your sodium thiosulphate applications and ensure successful analytical and industrial outcomes.

Expert Consultation
  • Analytical method development
  • Application optimization guidance
  • Purity grade selection assistance
  • Troubleshooting support
  • Custom specification development
Laboratory Services
  • Custom analytical testing
  • Method validation support
  • Stability testing programs
  • Trace impurity analysis
  • Certificate of analysis interpretation
Training Programs
  • Analytical chemistry techniques
  • Safe handling procedures
  • Quality control methods
  • Regulatory compliance training
  • Best practices workshops
Supply Solutions
  • Flexible packaging options
  • Just-in-time delivery
  • Temperature-controlled logistics
  • Emergency supply protocols
  • Global distribution network

Environmental Impact & Sustainability

DRAVYOM is committed to sustainable sodium thiosulphate production and responsible environmental stewardship, implementing green chemistry principles and minimizing environmental impact throughout the product lifecycle.

Sustainable Production
  • Energy-efficient crystallization processes
  • Water recycling and treatment systems
  • Waste heat recovery technology
  • By-product utilization programs
  • Carbon footprint reduction initiatives
Environmental Protection
  • Zero liquid discharge systems
  • Air emission monitoring and control
  • Soil and groundwater protection
  • Biodiversity conservation programs
  • Environmental management certification
Safe Chemistry
  • Low toxicity profile (GRAS status)
  • Biodegradable in aquatic systems
  • Non-bioaccumulative properties
  • Safe disposal guidelines
  • Green chemistry alternative promotion

Manufacturing Excellence & Quality Control

DRAVYOM's state-of-the-art manufacturing facilities employ advanced crystallization technology and comprehensive quality assurance systems to ensure consistent, high-quality sodium thiosulphate production.

Advanced Production Technology
  • Controlled crystallization reactors
  • Automated quality monitoring systems
  • Real-time process control
  • Advanced filtration and drying technology
  • Predictive maintenance programs
Analytical Capabilities
  • High-precision gravimetric analysis
  • ICP-OES for trace metal analysis
  • Ion chromatography
  • Karl Fischer water determination
  • Statistical process control
Quality Certifications
  • ISO 9001:2015 Quality Management
  • ISO 14001:2015 Environmental Management
  • GMP compliance for pharmaceutical grades
  • USP/BP/EP pharmacopoeia compliance
  • ACS reagent grade certification

Market Applications & Performance Data

DRAVYOM's sodium thiosulphate has proven performance across diverse applications, with extensive field data demonstrating superior analytical accuracy and reliable industrial performance.

Analytical Chemistry Performance
Titration endpoint accuracy: ±0.05% Repeatability precision: 99.8% Total heavy metals: < 2 ppm
Water Treatment Data
Chlorine neutralization efficiency: 100% Complete reaction time: < 30 sec Stoichiometric ratio (Cl₂:Na₂S₂O₃): 1:1.5
Photography Industry Results
Silver recovery efficiency: 95%+ Fixing time completion: < 5 min Halide complex formation: 99.9%

DRAVYOM Competitive Advantages

Choose DRAVYOM for sodium thiosulphate solutions that deliver superior performance, reliability, and value. Our commitment to analytical excellence and pharmaceutical compliance sets us apart in the specialty chemicals industry.

Exceptional Purity

Consistent 99%+ purity with minimal heavy metal content, exceeding pharmacopoeia standards for analytical and pharmaceutical applications.

Pharmaceutical Compliance

Full USP, BP, and EP compliance with complete documentation for pharmaceutical and analytical chemistry applications.

Analytical Excellence

Advanced analytical capabilities ensuring precise characterization and quality control for demanding laboratory applications.

Superior Stability

Optimized crystal structure and moisture control ensuring long-term stability and consistent performance characteristics.

Environmental Safety

GRAS status with low toxicity profile and environmentally responsible production processes for sustainable operations.

Expert Support

Dedicated analytical chemistry team providing comprehensive technical support and method development assistance.