This compound is widely used in bioconjugation and drug delivery systems due to its polyethylene glycol (PEG) spacer, which enhances solubility and reduces immunogenicity. It is commonly employed to modify proteins, peptides, and other biomolecules, improving their stability and circulation time in the body. The carboxylic acid group allows for easy attachment to amine-containing molecules, making it a versatile linker in the synthesis of targeted therapeutics. Additionally, it is utilized in the development of hydrogels and other biomaterials for tissue engineering and regenerative medicine applications. Its biocompatibility and functional group make it a valuable tool in pharmaceutical and biomedical research.