Used primarily as a crosslinking agent in polymer chemistry, enabling the formation of stimuli-responsive and degradable polymer networks. Its dual azide functionality allows for efficient conjugation via click chemistry, particularly in the development of bioconjugates and functional materials. The disulfide (SS) linker provides a redox-sensitive bond, making it valuable in drug delivery systems where intracellular reduction triggers release. Commonly applied in the synthesis of smart hydrogels, nanoparticles, and targeted therapeutics that respond to cellular redox environments. Also utilized in surface functionalization and bioconjugation strategies requiring controlled cleavage under reducing conditions.