Used in biochemical research as a thiol-reactive crosslinking agent, particularly in protein conjugation and immobilization studies. Its disulfide bond allows reversible linkage under reducing conditions, making it valuable in drug delivery systems and bioconjugate chemistry. The carboxylic acid group enables further functionalization, such as coupling to amines or hydroxyls, enhancing its utility in surface modification and biosensor development. Also employed in the synthesis of stimuli-responsive polymers and smart materials due to its redox-sensitive cleavage properties.