- Product Name: Sodium Thiosulfate Pentahydrate
- CAS: 10102-17-7
- Catalog: HG-BULK017
- Applications: Photographic Fixing Agent, Electroplating, Leather Tanning, Reducing Agent, Dechlorination Agent, Sulfur Dyeing, Disinfectant and Fading Agent.
Sodium thiosulfate pentahydrate is a white, crystalline solid with a molecular formula that includes five water molecules, making it a hydrate form. It is typically produced through a reaction involving sodium sulfite and sulfur. Known for its strong reducing properties, this substance is primarily used in industries like photography, electroplating, leather tanning, and textile processing.
Key Features
Solubility
- Highly soluble in water, facilitating easy use in aqueous solutions.
Hydrate Form
- Pentahydrate form, providing stability and ease of handling.
Technical Data
| Items | Photographic grade | Industrial grade | Anhydrous grade |
| Appearance | Colorless transparent crystal | Colorless transparent crystal | White powder |
| Content | ≥ 99.0% | ≥ 98.5% | ≥ 97.0% |
| Water insoluble matters | ≤ 0.01% | ≤ 0.03% | ≤ 0.03% |
| Sulfides | ≤ 0.001% | ≤ 0.003% | ≤ 0.001% |
| Fe | ≤ 0.001% | ≤ 0.003% | ≤ 0.005% |
| Ph | 6.5~9.5 | 6.5~9.5 | 6.5~9.5 |
| Particle size | 12~16 grain/g | -- | -- |
Applications
Sodium thiosulfate pentahydrate, offered by Alfa Chemistry, is an indispensable chemical in a range of industrial sectors:
Photographic Fixing Agent
- It is widely used in photographic development as a fixing agent. It removes unreacted silver halides from photographic films and papers, ensuring the image remain intact after exposure and development.
Electroplating
- Used in the preparation of plating solutions for precious metals, such as gold and silver, it acts as a stabilizing agent to ensure the consistency of the electroplating process.
Leather Tanning
- In leather processing, it serves as a reducing agent to neutralize excess chromium, preventing discoloration and enhancing the quality of tanned leather products.
Reducing Agent
- Its powerful reducing properties make it valuable in various chemical reactions where reduction of other compounds is required.
Dechlorination Agent
- In textile and paper industries, it is used to remove residual chlorine after bleaching processes, preventing damage to materials and ensuring color stability.
Sulfur Dyeing
- It is an essential component in sulfur dyeing, used for the production of insoluble, stable dyes that are commonly applied to fabrics.
Disinfectant and Fading Agent
- In water treatment and sanitation, it neutralizes chlorine-based disinfectants, making it a useful tool for dechlorination.
Storage and Packaging
- Storage Conditions: Stored in a cool, dry place, away from direct sunlight and moisture. Be kept in tightly sealed containers to prevent contamination and the absorption of additional water.
- Packaging: Typically packaged in 25kg and 50kg plastic woven bags. Custom packaging options are available to meet specific customer requirements.
Alfa Chemistry's sodium thiosulfate pentahydrate is a high-purity, crystalline compound widely used in industries like photography, electroplating, leather tanning, and textile processing. For more information, please feel free to contact us.
