This chemical is widely used in bioconjugation and drug delivery systems due to its polyethylene glycol (PEG) chain, which enhances solubility and reduces immunogenicity. It is often employed to modify peptides, proteins, or other biomolecules, improving their pharmacokinetics and stability in biological environments. The amine group allows for easy attachment to target molecules, while the carboxylic acid group facilitates further functionalization or conjugation. It is particularly valuable in the development of therapeutics, such as PEGylated drugs, where prolonged circulation time and reduced toxicity are critical. Additionally, it finds applications in research for creating custom linkers or spacers in molecular probes and diagnostic tools.