Analytical Grade Sodium Thiosulfate (Na2S2O3) for Titration Reagent with pH 6.5-8.0

Product Overview

Our Sodium Thiosulfate (Na₂S₂O₃), commonly known as "Hypo" or photographic fixer, is a high-purity crystalline compound widely used in photographic processing, water treatment, and chemical industries. With excellent reducing properties and solubility, it serves as a versatile chemical across multiple applications.

Technical Specifications

✅ Chemical Formula: Na₂S₂O₃
✅ Purity: ≥99% (Anhydrous)
✅ Appearance: White crystalline powder
✅ Solubility: Highly water soluble
✅ pH Value: 6.5-8.0 (5% solution)
✅ Packaging: 25kg/bag or customized options

Analytical Grade Sodium Thiosulfate holds a position as a core standard reagent in quantitative analytical chemistry, renowned particularly for its performance in iodometric titration. Iodometry is a classic redox titration method based on the oxidizing power of iodine and the reducing power of iodide ions. Sodium Thiosulfate serves as the standard reducing agent used to precisely determine the concentration of various oxidizing substances. Its reaction with iodine is stoichiometrically well-defined, rapid, and quantitative: 2Na₂S₂O₃ + I₂ → Na₂S₄O₆ + 2NaI. This characteristic makes it a reference material for assaying diverse substances, including residual chlorine in water samples, ozone, hydrogen peroxide, active ingredients in pharmaceuticals (like Vitamin C), and copper content in copper ores. Our Analytical Grade Sodium Thiosulfate is produced under strict quality control, ensuring a purity of over 99.5%, with very low impurity levels. Indicators such as water content and insoluble matter comply with or exceed national chemical reagent standards. To maintain stability, the product is typically in the form of pentahydrate crystals and stored and transported in light-proof, sealed containers. Before use, it may sometimes require standardization against a primary standard like potassium dichromate to ascertain its exact concentration. For any laboratory requiring high-precision analytical results—be it environmental monitoring stations, pharmaceutical QC departments, or research institutions—this product is the cornerstone for ensuring data accuracy and reliability.

Safety & Handling

⚠ Storage: Keep in dry, cool, and well-ventilated area
⚠ Handling: Wear appropriate PPE (gloves, goggles)
⚠ Incompatibilities: Strong oxidizers, acids

Why Choose Us?

✅ High-purity products, in compliance with international standards
✅ 30+ Years Chemical Manufacturing Experience
✅ Strict QC with Batch Traceability
✅ Global logistics, supporting sea and air transportation
✅ Technical support, providing customized solutions
✅ Factory direct supply, with strong price competitiveness