Your Trusted Sodium Thiosulfate Supplier in India


Kolkata Chemical is a renowned supplier, manufacturer, and distributor of Sodium Thiosulfate, serving the diverse chemical needs of industries across India.

Product Details: CAS NO: 7772-98-7 Formula: Na2S2O3·5H2O

Product Description: Sodium Thiosulfate, available in crystalline form, is a versatile chemical compound widely used in various industrial applications. It is a colorless, odorless substance that readily dissolves in water.

Usage and Applications: Sodium Thiosulfate finds extensive usage across industries, including:

  1. Photography: It is a crucial component in photographic fixer solutions to remove unexposed silver halide from photographic films or papers.
  2. Water Treatment: Sodium Thiosulfate is employed to neutralize chlorine in swimming pools and water treatment plants.
  3. Medical Applications: It is utilized in medical treatments to remove excess cyanide in cases of cyanide poisoning.
  4. Industrial Processes: Sodium Thiosulfate plays a significant role in gold extraction, textile manufacturing, and leather tanning processes.

Product Parameters:

  • Grade Standard: Industrial Grade
  • Certification: ISO 9001:2015 certified
  • Purity: ≥ 99%
  • Appearance: White crystalline powder
  • Specifications: Available in various mesh sizes to meet specific customer requirements

Our Advantages:

  1. Superior Quality Products: Kolkata Chemical ensures stringent quality control measures throughout the manufacturing process, delivering Sodium Thiosulfate that meets international standards.
  2. Extensive Global Reach: Apart from serving customers in India, we supply Sodium Thiosulfate to top cities across the Middle East and worldwide, including Dubai, Riyadh, Doha, Kuwait City, London, New York, and more.
  3. Timely Delivery: We prioritize prompt and efficient delivery, meeting customer deadlines and ensuring smooth operations.
  4. Customized Solutions: Kolkata Chemical offers tailored solutions to meet specific customer requirements, providing personalized support and assistance.
  5. Excellent Customer Service: We strive to deliver exceptional customer service, addressing inquiries and providing technical assistance throughout the customer journey.

Company Information: Kolkata Chemical is a reputable name in the chemical industry, recognized for reliability, quality products, and customer-centricity. With state-of-the-art manufacturing facilities and a robust distribution network, we have established ourselves as a leading supplier of chemicals, serving clients across India and beyond.


  • Standard Packing: 25 kg bags or as per customer requirements
  • Customized Packaging: Specialized packaging options available upon request

Plant Area: Our advanced manufacturing facility in Kolkata encompasses a considerable area, equipped with modern machinery and adhering to strict safety and environmental regulations.

Terms of Payment: We offer flexible payment terms to ensure convenience for our clients. Specific details can be discussed during the order process.

Nearest Port: Located in Kolkata, our operations benefit from the proximity to the Kolkata Port, facilitating efficient logistics and timely delivery.

Import & Export Mode: Kolkata Chemical operates in both import and export modes, fostering strong trade partnerships with global clients.

 Kolkata Chemical stands as your trusted supplier, manufacturer, and distributor of Sodium Thiosulfate in India. With a commitment to quality, extensive global reach, and customer satisfaction, we aim to fulfill the chemical requirements of industries worldwide. Contact us today to experience our superior products and outstanding service.


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