Sodium Thiosulphate Pentahydrate - AR Grade Chemical Structure
AR Grade Premium
Analytical Reagent

AR Grade Sodium Thiosulphate Pentahydrate

Premium analytical reagent grade sodium thiosulphate pentahydrate engineered for demanding laboratory applications including iodometric titrations, analytical standards, and precision laboratory analysis. Our Na₂S₂O₃·5H₂O delivers exceptional purity, consistent performance, and reliable supply for critical analytical methods requiring superior reducing agent properties with stringent quality control standards.

  • 99.5% Minimum Purity
  • Primary Standard Grade
  • Iodometric Titrations
  • Consistent Batch-to-Batch Quality
  • Analytical Standards
  • Laboratory Analysis Applications
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Technical Specifications

Chemical Formula: Na₂S₂O₃·5H₂O
CAS Number: 10102-17-7
Concentration (Assay): ≥99.5% (AR Grade)
Physical State: White crystalline powder
Molecular Weight: 248.18 g/mol
Melting Point: 48°C (pentahydrate)
Solubility in Water: 70 g/100mL (20°C)
pH (5% solution): 6.0-8.4
Water Content: 36.0-37.0%
Insoluble Matter: ≤0.005%
Heavy Metals (as Pb): ≤0.001%
Sulfate (SO₄): ≤0.002%
Storage Temperature: Cool, dry place
Packaging Options: 100g, 500g, 1kg bottles

Applications

Iodometric Titrations
Reducing Agent
Primary Standards
Analytical Standards
Standardization Solutions
Iodine Analysis
Quality Control
Educational Laboratories
Research Applications
Chlorine Analysis
Volumetric Analysis
Pharmaceutical Testing

Industry-Specific Grades

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

AR Grade (Analytical Reagent)
Assay: ≥99.5% Insoluble: ≤0.005% Heavy Metals: ≤0.001% Application: General analytical work
Primary Standard Grade
Assay: 99.5-100.5% Water Content: Precise Equivalent Weight: Accurate Application: Primary standardization
ACS Grade
Assay: ACS compliant Sulfate: ≤0.002% pH: 6.0-8.4 Application: ACS certified work
Pharmaceutical Grade
Purity: USP/EP compliant Impurities: Controlled Documentation: Complete Application: Pharmaceutical testing

Quality Standards

DRAVYOM's AR Grade Sodium Thiosulphate Pentahydrate is manufactured under stringent quality control protocols, meeting international analytical standards including ACS, ISO, and pharmacopoeia specifications. Our primary standard grade production ensures consistent performance and regulatory compliance.

ISO 9001:2015 Certified Manufacturing
Primary Standard Grade
≥99.5% Assay Purity
Advanced Analytical Testing
Superior Titration Properties
Batch-to-Batch Consistency
Traceable Certificate of Analysis
Controlled Storage Conditions

Advanced Chemical Properties & Performance

AR Grade Sodium Thiosulphate Pentahydrate exhibits exceptional analytical properties essential for iodometric titrations and analytical standardization. Its ultra-pure composition and consistent reducing characteristics ensure reliable performance in demanding analytical procedures and titrimetric protocols.

Chemical Properties
Molecular Formula: Na₂S₂O₃·5H₂O
Molecular Weight: 248.18 g/mol
Reducing Agent: Iodometric titrations
Equivalent Weight: 248.18 g/equiv
Physical Properties
Appearance: Colorless monoclinic crystals
Melting Point: 48°C (with decomp.)
Solubility (20°C): 701 g/L in water
Density: 1.69 g/cm³
Titrimetric Properties
Primary Use: Iodine standardization
Reaction Stoichiometry: 1:1 (thiosulfate:iodine)
Endpoint Detection: Starch indicator
pH Independence: Works in neutral/acidic pH
Purity Specifications
Chemical Purity: ≥99.0%
Water Content: 36.0-37.0% (5H₂O)
Heavy Metals: ≤5 ppm
Sulfate (SO₄²⁻): ≤0.02%
Stability Properties
Shelf Life: 3 years (unopened)
Solution Stability: 2-3 weeks refrigerated
Oxidation Sensitivity: Slow air oxidation
Light Stability: Protect from direct sunlight

Performance Characteristics

Detailed performance metrics demonstrate AR Grade Sodium Thiosulphate Pentahydrate superiority in analytical applications with exceptional reducing properties, iodometric reliability, and reproducibility across diverse titrimetric procedures and standardization protocols.

Reducing Power

Iodine reaction: quantitative

Reliable iodometric titrant
Standardization

Accuracy: ±0.1% typical

Good analytical precision
Solubility

Water: 701 g/L at 20°C

Excellent aqueous solubility
Temperature Range

Working: 15-30°C optimal

Room temperature stable
Reproducibility

RSD: ≤0.2% between batches

Good lot consistency
Solution Life

Stability: 2-3 weeks refrigerated

Reasonable working stability

Safety Information

Generally considered low hazard material. May cause mild skin and eye irritation. Handle with standard laboratory precautions including gloves and safety goggles. Use in well-ventilated areas and avoid inhalation of dust particles. May release sulfur dioxide when heated.

Low Hazard
Eye Protection
Standard Precautions

Storage & Handling

Store in original containers in a cool, dry place protected from light and air. Keep containers tightly closed and use clean analytical techniques. Prepare standard solutions using boiled, cooled distilled water for optimal stability.

Cool, dry storage
Protect from light
Glass containers preferred
Iodometric grade handling

Chemical Mechanisms & Reaction Pathways

Sodium thiosulphate pentahydrate exhibits primary standard properties and reducing characteristics through multiple reaction pathways, enabling precise analytical applications including iodometric titrations and standardization procedures.

Iodometric Reactions

2S₂O₃²⁻ + I₂ → S₄O₆²⁻ + 2I⁻ (thiosulphate-iodine reaction)

Primary standard for iodine standardization
Redox Reactions

Reducing agent in analytical redox titrations

Precise stoichiometric reactions
Hydration Equilibrium

Na₂S₂O₃·5H₂O crystalline hydrate with stable water content

Consistent analytical performance
Primary Standard

High purity and stability for volumetric standardization

Reference compound for iodometric titrations

Regulatory Compliance & Documentation

Comprehensive regulatory compliance ensures global analytical laboratory access with complete documentation packages supporting international standards and analytical method validations.

ACS Specifications

American Chemical Society analytical reagent standards compliance

ISO 6353 Standard

International standard for reagent specifications and testing

Primary Standard Certification

Certified as analytical primary standard for iodometric analysis

REACH Registration

European Union chemical regulation compliance

USP Grade Available

United States Pharmacopeia specifications for pharmaceutical analysis

SDS Documentation

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

Technical Support & Value-Added Services

DRAVYOM's analytical chemistry team provides comprehensive iodometric titration support, standardization assistance, and analytical services to optimize AR Grade Sodium Thiosulphate Pentahydrate performance in your analytical applications.

Iodometric Method Development
  • Titration endpoint optimization
  • Starch indicator protocols
  • pH optimization methods
  • Interference elimination
Analytical Services
  • Certificate of Analysis verification
  • Primary standard validation
  • Water content analysis
  • Stability testing
Technical Support
  • Volumetric analysis consultation
  • Method standardization support
  • Troubleshooting assistance
  • Quality control protocols
Standardization Services
  • Reference standard preparation
  • Titration method validation
  • Uncertainty calculations
  • Traceability documentation

Environmental Impact & Sustainability

Our AR Grade Sodium Thiosulphate Pentahydrate production emphasizes environmental responsibility through sustainable manufacturing practices, waste minimization, and comprehensive environmental impact management for analytical laboratory operations.

Waste Minimization

Comprehensive recovery and recycling of sulfur compounds

Emission Control

Advanced containment systems for sulfur compound capture

Clean Production

Green chemistry principles in synthesis and crystallization

Safe Disposal

Environmentally safe disposal protocols for sulfur compounds

ISO 14001

Environmental management system certified production

Container Recycling

Glass container return and recycling programs

Manufacturing Excellence & Quality Control

DRAVYOM's specialized analytical reagent manufacturing facility employs advanced synthesis technology with continuous monitoring systems to ensure consistent AR Grade Sodium Thiosulphate Pentahydrate quality and primary standard performance.

Production Process

Controlled crystallization with hydration and purification

Primary standard purity and water content
Quality Testing

23-point analytical testing protocol including purity and water content

Iodometric and Karl Fischer verification
Quality Systems

ISO 9001:2015 quality management with primary standard certification

Continuous improvement and validation
Packaging Control

Moisture-controlled containers with stability monitoring

Hydrate stability and contamination prevention

Market Applications & Performance Data

Comprehensive analytical laboratory data demonstrating AR Grade Sodium Thiosulphate Pentahydrate effectiveness across diverse applications with quantified performance metrics and analytical method validations.

Iodometric Applications
Precision: ±0.006% RSD in iodometric titrations Primary Standard: 99.99%+ purity Stability: >3 years under proper storage
Research Institutions
Publication Support: 2000+ cited methods Reproducibility: >99.9% inter-lab agreement Innovation: Advanced iodometric protocols
Quality Control Labs
Reliability: 99.9% batch consistency Audit Success: 100% regulatory compliance Efficiency: 50% faster iodometric analysis

DRAVYOM Competitive Advantages

Superior Iodometric Performance

Consistently exceeds ACS specifications with exceptional purity and analytical performance

Primary Standard Excellence

Certified primary standard with exceptional purity and hydration stability

Analytical Expertise

Dedicated iodometric chemistry team provides standardization and method development support

Quality Assurance

Traceable certificates with comprehensive analytical data and hydration characterization

Global Standards

International compliance with ACS, USP, and ISO specifications for worldwide analytical acceptance

Partnership Approach

Collaborative relationships with analytical laboratories and custom iodometric standardization solutions