Used in bioconjugation and drug delivery systems, it serves as a linker to attach targeting molecules or drugs to nanoparticles or proteins. Its aldehyde group enables specific reactions with amines, facilitating stable covalent bonds. Commonly applied in the development of antibody-drug conjugates (ADCs) and PEGylated therapeutics to enhance solubility, stability, and circulation time. Also utilized in surface modification of biomaterials for improved biocompatibility and functionality.