Used as a crosslinking agent in polymer chemistry, particularly in the synthesis of functional hydrogels and responsive materials. It contains a disulfide group (reducible to thiols), an alkyne moiety for click chemistry reactions, and a terminal hydroxyl group. These features enable efficient thiol-ene couplings (post-reduction) and azide-alkyne cycloadditions, making it valuable in bioconjugation, surface modification, and controlled network formation. Commonly applied in drug delivery systems and biomaterials. Also utilized in the development of biosensors for anchoring biomolecules onto sensor surfaces through selective coupling.