nátriumtioszulfátnak

Nátriumtioszulfát, also known as sodium thiosulfate, is an inorganic compound with the chemical formula Na₂S₂O₃. It is commonly encountered as the pentahydrate, Na₂S₂O₃·5H₂O, which appears as colorless crystalline solids. It is readily soluble in water but insoluble in ethanol.

Sodium thiosulfate is a versatile chemical with numerous applications. In photography, it is widely used as a fixer, removing undeveloped silver halide crystals from photographic emulsions after exposure. This process is crucial for making the image permanent and preventing further darkening. In medicine, it is employed as an antidote for cyanide poisoning. It works by reacting with cyanide ions to form less toxic compounds. It can also be used in the treatment of calciphylaxis and as a dermatological agent.

In the chemical industry, sodium thiosulfate finds use in various processes. It serves as a reducing agent in redox titrations, particularly for the determination of iodine. It is also used in the textile industry for dechlorination and as a bleaching agent. In water treatment, it can be used to remove chlorine from water, making it safe for aquatic life or for industrial processes. Its ability to complex with various metal ions also makes it useful in certain metallurgical applications.

Sodium thiosulfate is generally considered safe when handled properly, though it can cause mild irritation upon contact with skin or eyes. It is important to consult safety data sheets for specific handling precautions.