This compound is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS) processes. It serves as a linker or spacer molecule, enabling the attachment of peptides to solid supports while maintaining flexibility and solubility. The Fmoc group provides protection for the amine functionality during synthesis, which can be selectively removed under mild conditions. The PEG6 (polyethylene glycol) spacer enhances solubility in aqueous and organic solvents, reducing aggregation and improving reaction efficiency. The terminal carboxylic acid group allows for further conjugation or coupling with other molecules, making it valuable in the development of peptide-based drugs, bioconjugates, and biomaterials. Its applications extend to the creation of peptide libraries, drug delivery systems, and targeted therapeutics, where precise control over molecular interactions is essential.