This compound is widely used in bioconjugation and peptide synthesis due to its reactive NHS ester group, which facilitates efficient coupling with amino groups in proteins, peptides, or other biomolecules. Its Fmoc group provides protection during solid-phase peptide synthesis, allowing for controlled and sequential assembly of peptides. The PEG3 spacer enhances solubility and reduces steric hindrance, making it particularly useful in creating linkers for drug delivery systems, antibody-drug conjugates, and other bioconjugates. It is also employed in the development of hydrogels, surface modifications, and functionalized materials for biomedical research, where precise and stable conjugation is essential.