Used in biochemical research as a precursor for synthesizing peptides and proteins, particularly in studies involving cysteine derivatives. It serves as a building block in the development of enzyme inhibitors and pharmaceutical compounds. Applied in the production of chelating agents for metal ions, aiding in detoxification processes. Also utilized in the synthesis of antioxidants and as a reagent in organic chemistry for introducing thiol groups into molecules. Its role in studying oxidative stress and redox biology is significant due to its thiol functionality.