This chemical is widely used in bioconjugation and drug delivery systems due to its PEG (polyethylene glycol) spacer, which enhances solubility and reduces immunogenicity. The FMOC (fluorenylmethyloxycarbonyl) group serves as a protective group in peptide synthesis, allowing for controlled deprotection during the synthesis process. The terminal carboxylic acid group enables covalent attachment to various molecules, such as proteins, peptides, or nanoparticles, making it valuable in creating targeted therapeutic agents. Its application extends to the development of prodrugs, where it helps improve the pharmacokinetic properties of active pharmaceutical ingredients. Additionally, it is utilized in the preparation of hydrogels and biomaterials for tissue engineering, where its biocompatibility and functionalization capabilities are advantageous.