This chemical is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS) as a linker or spacer. Its PEG (polyethylene glycol) chain provides solubility and flexibility, making it useful for improving the efficiency of peptide coupling reactions. It is also employed in bioconjugation, where it helps attach peptides or proteins to other molecules, such as drugs, dyes, or nanoparticles, while maintaining stability and reducing steric hindrance. Additionally, it is utilized in the development of drug delivery systems, where its hydrophilic PEG segment enhances biocompatibility and prolongs circulation time in the body. Its Fmoc group allows for easy deprotection during synthesis, making it a versatile tool in organic and medicinal chemistry.