Used as an antidote for mercury and heavy metal poisoning due to its strong chelating properties. It binds to toxic metals in the body, forming stable complexes that are excreted through urine, thus reducing metal accumulation in organs. Commonly applied in medical treatments involving acute or chronic exposure to mercury, lead, and other toxic metals. Also utilized in research settings to protect thiol groups in proteins and enzymes from oxidation, helping maintain their activity during biochemical experiments. Its ability to penetrate cell membranes enhances its effectiveness in intracellular detoxification processes.