Sodium Thiosulfate, 99% – Laboratory Grade
CAT No.: ASC-1059
CAS Number: 7772-98-7
Molecular Formula: Na₂S₂O₃
Molar Mass: 158.11 g/mol
 
Overview
Sodium Thiosulfate is a high-purity, analytical-grade compound widely utilized in various laboratory and industrial applications. Known for its reducing and complexing properties, it serves as a crucial reagent in analytical chemistry, water treatment, and photographic processing.
Key Features
Purity: ≥99%
Appearance: White crystalline Solid
Solubility: Highly soluble in water (210 g/L at 20°C)
pH (50 g/L at 20°C): 6.0–8.5
Density: 1.67 g/cm³ at 20°C
Melting Point: Decomposes upon heating
Analytical Chemistry: Employed in iodometric titrations and as a reducing agent in various analyses.
Water Treatment: Acts as a dechlorinating agent, neutralizing residual chlorine in water systems.
Photography: Used as a fixer to dissolve unreacted silver halides from photographic emulsions.
Textile Industry: Functions as a bleaching agent and mordant in dyeing processes.
Aquaculture: Helps in detoxifying water by neutralizing harmful substances.aphpharma.com
Safety and Handling
Hazard Statements: H315 – Causes skin irritation; H319 – Causes serious eye irritation; H335 – May cause respiratory irritation.
Precautionary Measures: Wear protective gloves, clothing, and eye protection. Ensure adequate ventilation during handling.
Storage Conditions: Store in a cool, dry, well-ventilated area away from incompatible substances such as acids and oxidizing agents.
For detailed safety information, please refer to the Safety Data Sheet (SDS).
 
Packaging and Availability
Available in various packaging sizes to meet diverse requirements. For bulk orders or specific packaging needs, please contact our sales team.