Used in bioconjugation and drug delivery systems, it serves as a linker to attach molecules like peptides, proteins, or drugs to nanoparticles or other carriers. Its PEG spacer enhances solubility and reduces immunogenicity, while the amine group allows for further functionalization. Commonly applied in targeted cancer therapies, it helps improve the stability and bioavailability of therapeutic agents. It is also utilized in diagnostic imaging to create targeted probes for better visualization of diseased tissues.