Thiosulfate is a chemical compound with the formula Na2S2O3 when in its sodium salt form. It consists of sulfur and oxygen and is commonly used in various applications, including photography and water treatment. Thiosulfate acts as a reducing agent, helping to neutralize harmful substances in the environment. In addition to its industrial uses, thiosulfate plays a role in biological processes. It can be found in some metabolic pathways and is involved in the detoxification of certain compounds. Its ability to interact with heavy metals makes it valuable in environmental remediation efforts.