Used as an antidote for cyanide poisoning, administered intravenously to convert cyanide into less toxic thiocyanate. Employed in water treatment to neutralize chlorine and chloramines in aquariums, swimming pools, and wastewater. Commonly used in photography as a fixing agent to dissolve unexposed silver halides from photographic film and paper. Applied in analytical chemistry for iodometric titrations, where it reacts with iodine to determine concentration of oxidizing agents. Utilized in medical treatments for conditions like calciphylaxis and certain dermatological disorders due to its ability to reduce calcium deposits. Used in gold mining to leach gold from ore in a process known as thiosulfate leaching, offering a less toxic alternative to cyanide.