This compound is widely used in bioconjugation and drug delivery systems due to its reactive functional groups. The aldehyde group allows for selective conjugation with amines, making it valuable for linking molecules like proteins, peptides, or antibodies. The amide bond provides stability, while the PEG (polyethylene glycol) spacer enhances solubility and reduces immunogenicity. The carboxylic acid group enables further modification or attachment to other molecules. It is particularly useful in creating targeted therapeutics, such as antibody-drug conjugates (ADCs), and in modifying biomaterials for improved biocompatibility. Its applications also extend to surface functionalization in nanotechnology and the development of biosensors.