Product Overview

Sodium Thiosulfate Pentahydrate is a versatile inorganic salt widely used in water treatment, photography, chemical processing, pharmaceuticals, and textile industries. It is known for its excellent reducing ability, high solubility in water, and stable performance under normal storage conditions.

Basic Information

• Product Name: Sodium Thiosulfate Pentahydrate

• CAS Number: 10102-17-7

• Molecular Formula: Na₂S₂O₃·5H₂O

• Molecular Weight: 248.18

• Appearance: Colorless transparent crystals or white crystalline powder

• Chemical Type: Inorganic salt

Key Features 

• Excellent reducing and dechlorination performance

• High water solubility, easy to handle and apply

• Stable crystal structure with consistent quality

• Economical choice for large-volume industrial use

• Widely accepted across multiple industries

Main Applications

• Water Treatment
  Used as a dechlorinating agent to neutralize residual chlorine in drinking water and wastewater.

• Photography Industry
  Acts as a photographic fixer, dissolving unreacted silver salts.

• Chemical Manufacturing
  Used as a reducing agent and intermediate in various chemical processes.

• Pharmaceutical Industry
  Applied in detoxification processes and medical formulations.

• Textile & Leather Processing
  Used for bleaching control and sulfur removal.

Technical Specifications 

FAQ

Q1: What is Sodium Thiosulfate Pentahydrate mainly used for?

A: It is primarily used for water dechlorination, photographic fixing, chemical reduction reactions, pharmaceutical detoxification, and textile processing.

Q2: Is Sodium Thiosulfate Pentahydrate soluble in water?

A: Yes, it is highly soluble in water, making it easy to dissolve and apply in various industrial and laboratory processes.

Q3: What is the difference between anhydrous and pentahydrate sodium thiosulfate?

A: The pentahydrate form contains five molecules of crystal water, offering better handling properties and stability, while the anhydrous form is more concentrated and moisture-sensitive.

Q4: Is this product suitable for water treatment applications?

A: Yes, it is widely used to neutralize chlorine and chloramine in drinking water, aquaculture, and wastewater treatment systems.

Q5: How should the product be stored to maintain quality?

A: Store in sealed packaging in a dry, cool environment, away from heat, moisture, and incompatible chemicals.