Sodium Thiosulfate – Versatile Chemical for Water Treatment, Photography, Laboratory & Industrial Applications

Exceptional versatility. Reliable chemical performance. A trusted solution for countless applications.

Discover the many uses of Sodium Thiosulfate, a versatile chemical compound valued for its reducing properties, ability to neutralize chlorine, and important role in a wide range of laboratory, industrial, and commercial applications.

Available in a convenient solid crystalline form, sodium thiosulfate is an established chemical reagent used in everything from water treatment and photographic processing to analytical chemistry and specialized manufacturing.

Whether you're a laboratory professional, water-treatment specialist, photographer, or industrial formulator, sodium thiosulfate offers an impressive range of practical applications.

Key Features & Benefits

• Chlorine neutralization: Reacts with residual chlorine in compatible water-treatment applications.

• Reducing agent: Useful in chemical processes requiring a reducing agent.

• Water soluble: Dissolves readily in water for appropriate aqueous applications.

• Photographic applications: Traditionally used as a photographic fixing agent.

• Laboratory versatility: A valuable reagent for analytical chemistry and chemical testing.

• Industrial applications: Used in selected manufacturing, processing, and treatment operations.

The Many Uses of Sodium Thiosulfate

1. Water Treatment and Dechlorination

One of its best-known applications is neutralizing residual chlorine in water. Sodium thiosulfate is used in water-treatment operations, aquarium water preparation, laboratory water testing, and certain industrial water systems.

2. Photography and Darkroom Processing

A traditional photographic chemical, sodium thiosulfate is commonly known as photographic fixer or hypo. It helps dissolve and remove unexposed silver halides from photographic film and paper, making the developed image permanent.

3. Laboratory and Analytical Chemistry

Widely used in analytical chemistry, sodium thiosulfate is an important reagent in iodometric titrations and other quantitative testing procedures. It is particularly useful in determining oxidizing agents and measuring certain chemical concentrations.

4. Industrial Chemical Processing

Used in selected industrial processes as a reducing agent and chemical processing ingredient. Its applications depend on the specific manufacturing process and required chemical specifications.

5. Textile and Dye Processing

Sodium thiosulfate has applications in certain textile-processing operations, including processes involving the removal or reduction of residual oxidizing agents.

6. Gold and Precious Metal Processing

Sodium thiosulfate has been investigated and used in specialized precious-metal recovery chemistry as an alternative complexing agent in certain gold-leaching systems.

7. Aquarium and Aquaculture Applications

Used to neutralize chlorine in appropriately treated water, making it useful in certain aquarium and aquaculture water-preparation procedures. Dosage should be based on actual water chemistry and product specifications.

8. Chemical Research and Formulation

A useful chemical reagent for research, educational demonstrations, and specialized formulations involving thiosulfate chemistry and reduction reactions.

Why Choose Sodium Thiosulfate?

Few chemical compounds offer such a diverse range of established applications. From removing residual chlorine and developing traditional photographs to supporting laboratory analysis and specialized industrial processes, sodium thiosulfate is a valuable addition to many chemical inventories.

Versatile, dependable, and widely used – sodium thiosulfate is an essential chemical for a variety of technical, laboratory, and industrial applications.

Product Information

• Chemical Name: Sodium Thiosulfate

• Chemical Formula: Na₂S₂O₃·5H₂O (pentahydrate)

• CAS Number: 7772-98-7 (anhydrous) / 10102-17-7 (pentahydrate)

• Appearance: White crystalline powder or colorless/white crystals, depending on form

• Solubility: Water soluble

• Applications: Water treatment, photography, laboratory chemistry, industrial processing, and research.