Sodium thiosulfate

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Product Name: Sodium Thiosulfate

Other Names: Sodium Thiosulphate, Hypo

CAS No.: 7772-98-7 (anhydrous), 10102-17-7 (pentahydrate)

Molecular Formula: Na₂S₂O₃

Specification: Purity ≥ 99%, available as anhydrous or pentahydrate crystalline powder, meets industrial and pharmaceutical standards

Appearance and Color: White powder

Ingredient Information: Sodium Thiosulfate is an inorganic compound typically obtained as a pentahydrate from the reaction of sodium sulfite with sulfur or through waste sodium sulfide from dye production. Composed of sodium, sulfur, and oxygen, it forms a stable, water-soluble powder widely used as a reducing agent. The pentahydrate form contains five water molecules, enhancing its solubility and crystalline structure.

Uses: Widely used in medical applications to treat cyanide poisoning by converting cyanide to non-toxic thiocyanate, often in combination with sodium nitrite. It is also employed in photography as a fixer to dissolve unexposed silver halides and in water treatment to neutralize chlorine. Additionally, it serves as an analytical reagent in iodometry and a bleaching agent in various industrial processes.