Used extensively in bioconjugation and peptide synthesis, this compound serves as a linker to attach peptides or other molecules to surfaces or biomolecules. Its Fmoc group allows for selective deprotection in solid-phase peptide synthesis, enabling the stepwise construction of peptides. The PEG spacer enhances solubility and reduces steric hindrance, improving the efficiency of conjugation reactions. The NHS ester reacts with primary amines, facilitating stable amide bond formation with proteins, antibodies, or other amine-containing molecules. It is particularly valuable in drug delivery systems, where it helps create targeted therapies by linking drugs to carriers or antibodies. Additionally, it is employed in surface modification for biosensors and biomaterials, enhancing biocompatibility and functionality.