Used as a bifunctional linker in bioconjugation chemistry, enabling the attachment of biomolecules such as peptides, proteins, or fluorescent tags to surfaces, nanoparticles, or other molecules. Its primary amine and carboxylic acid groups allow for sequential coupling reactions under standard peptide synthesis conditions, making it valuable in the development of diagnostic assays, targeted drug delivery systems, and functionalized materials. Commonly employed in immobilizing ligands on biosensor chips or modifying pharmaceutical compounds to enhance solubility or binding affinity.