Used as a crosslinking agent in polymer chemistry, particularly in the development of hydrogels and biocompatible networks. Its symmetrical structure with reactive N-hydroxysuccinimide (NHS) ester groups allows efficient coupling with amine-functionalized polymers, enabling the formation of stable, biodegradable matrices for drug delivery systems and tissue engineering scaffolds. Commonly employed in aqueous conditions at physiological pH, it supports bioconjugation and the construction of functional biomaterials with controlled mechanical and degradation properties.