Sodium thiosulphate (Na2S2O3) is a versatile chemical widely used in photography as a fixing agent, in water treatment to remove chlorine, and in the textile industry as a bleaching and dyeing aid. It is also used in gold and silver extraction, leather processing, and paper manufacturing. In medicine, it serves as an antidote for cyanide poisoning and is used to treat certain skin conditions. Additionally, it is employed as a laboratory reagent and in analytical chemistry because of its reducing and complexing properties