Sodium Thiosulphate

Product Overview

Sodium Thiosulphate is an inorganic sulfur-containing salt widely used as a reducing agent, dechlorinating agent, photographic fixing agent, and chemical intermediate. It is known for its excellent water solubility, chemical stability, and strong ability to neutralize oxidizing agents such as chlorine.

Sodium thiosulphate is commonly supplied in pentahydrate crystalline form, making it suitable for applications in water treatment, photography, mining, pharmaceuticals, textiles, and chemical manufacturing.

Key Product Identification

• Product Name: Sodium Thiosulphate

• Alternative Spelling: Sodium Thiosulfate

• Chemical Formula: Na₂S₂O₃·5H₂O

• CAS Number: 10102-17-7

• Molecular Weight: 248.18 g/mol

• HS Code: 28323000

• Appearance: Colorless to white crystalline solid

• Odor: Odorless

• Solubility: Freely soluble in water

Chemical & Physical Properties

Manufacturing & Quality Control

Sodium Thiosulphate is produced through controlled reaction of sodium sulfite with sulfur, followed by crystallization and drying. Strict quality control ensures high purity, low impurity levels, and consistent crystal structure.

Quality assurance includes:

• Assay and purity analysis

• Impurity and heavy metal testing

• Moisture and solubility checks

• Batch traceability with COA

Available grades:

• Industrial Grade

• Photographic Grade

• Pharmaceutical Grade

Applications of Sodium Thiosulphate

Water Treatment

• Dechlorination of drinking and wastewater

• Neutralization of chlorine and chloramine

• Used in municipal and industrial water systems

Photography

• Fixing agent in photographic processing

• Removes unreacted silver halides

Mining & Metallurgy

• Gold and silver extraction processes

• Leaching and metal recovery

Pharmaceutical & Medical Use

• Antidote for cyanide poisoning

• Component in medical formulations (pharma grade)

Textile & Chemical Industry

• Reducing agent in dyeing and bleaching

• Chemical intermediate and laboratory reagent

Packaging & Storage

• Packaging Options:

• 25 kg woven bag or PE-lined bag

• 1,000 kg jumbo bag

• Customized packaging available

• Storage Conditions:

• Store in a cool, dry, and well-ventilated area

• Protect from heat and strong oxidizing agents

• Keep containers tightly closed

• Shelf Life: 24 months under proper storage conditions

Safety & Handling

• Low toxicity under normal industrial use

• Avoid inhalation of dust

• Use protective gloves and eye protection

• Refer to SDS / MSDS for detailed safety information

Regulatory & Compliance

Available documentation:

• COA (Certificate of Analysis)

• SDS / MSDS

• REACH and export compliance documents

• Pharmaceutical-grade support upon request

Why Choose Our Sodium Thiosulphate?

• ✔ High purity and consistent quality

• ✔ Reliable performance in dechlorination and reduction

• ✔ Multiple grades for different industries

• ✔ Competitive pricing and stable global supply

• ✔ Professional technical and regulatory support

Frequently Asked Questions (FAQ)

Q1: What is Sodium Thiosulphate used for?

It is mainly used for dechlorination, photography fixing, mining, and as a reducing agent.

Q2: Can Sodium Thiosulphate remove chlorine from water?

Yes, it is highly effective at neutralizing free chlorine and chloramine.

Q3: Is Sodium Thiosulphate safe to handle?

It is generally safe when handled according to standard chemical safety practices.

Q4: What form is commonly supplied?

It is most commonly supplied as sodium thiosulphate pentahydrate crystals.