Sodium Thiosulfate

Sodium Thiosulfate is a reducing agent used as a photographic fixer, dechlorinator, and in medicinals.

Formula:: Na₂S₂O₃·5H₂O
CAS:: 7772-98-7
Min. Order:: 200KG
Molecular Wt:: 248.18 (pentahydrate)
Melting Pt:: 48–50°C (decomposes)
Appearance:: Colorless crystals or powder.
Application:: Photography: Fixer to remove unexposed silver halide.

Water Treatment: Dechlorination.

Medicine: Antidote for cyanide poisoning.
Packaging:: 25kg bags with moisture barrier.
Storage:: Store in sealed, cool, dry conditions.
Transportation:: Non‑hazardous; avoid moisture exposure.
Summary:: An essential reducing salt in photography, water treatment, and emergency medicine.