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Sodium thiosulfate pentahydrate, often known as sodium hyposulfite, is a white, slightly efflorescent, solid. It is odorless and almost insoluble in alcohols. It is used in titrations, as an antidote for cyanide poisoning and as a chlorine remover in swimming pools.

ACS Reagent Grade

American Elements produces sodium thiosulfate pentahydrate to a wide range of standard and custom sizes. It is available in most volumes, including high purity, submicron and nanopowder forms.

Sulfur – Alkali Method

In this chemical technique, sulfur powder is dissolved in hot sodium thiosulfate solution for reaction. Then, caustic soda is added for neutralization. Finally, impurities are removed through filtration. The filtrate is concentrated, filtered and crystallized.

Purified gas by-product metode

This chemical process uses the raw material of coke oven gas arsenic sulfide wastewater as a source. Its process consists of the following steps: dissolving the sodium thiosulfate in water, adding sulfur dioxide gas to precipitate it, then add caustic soda to neutralize, filter and re-filter. After re-filtration, the sodium thiosulfate is concentrated, filtered and crystallized.

Sulfur – Alkali & Liquid Method

In the sodium alkali sulfide liquid method, barium sulfide wastewater (containing: sodium carbonate and sodium sulfide) is reacted with sulfur dioxide to precipitate the sodium sulfide. After clarifying, evaporation and cooling, the sodium sulfide is converted into sulfur dioxide. Then, sulfur dioxide is reacted with water to obtain the sodium thiosulfate.

Sodium thiosulfate is widely used in titrations and as an antidote for cisplatin and cyanide poisoning. It is also a disinfectant and a fixer for silver salts in photography. It is also used in aquaculture to remove chlorine from the water.