This chemical is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a linker or spacer, enabling the attachment of peptides to solid supports while maintaining solubility and flexibility during the reaction process. The Fmoc group provides protection for the amine functionality, allowing for selective deprotection and subsequent peptide chain elongation. The PEG20 segment enhances water solubility and reduces aggregation, making it particularly useful for synthesizing long or hydrophobic peptides. It is also employed in bioconjugation, where it facilitates the attachment of biomolecules to surfaces or other molecules for applications in drug delivery, diagnostics, and biomaterial development. Its versatility and biocompatibility make it a valuable tool in pharmaceutical and biotechnological research.