This chemical is widely used in bioconjugation and click chemistry applications, particularly in the development of drug delivery systems and biopharmaceuticals. Its aldehyde group allows for specific reactions with primary amines, enabling the attachment of biomolecules such as proteins or peptides. The benzyl group provides stability and hydrophobicity, which can be beneficial in controlling the release of active compounds. The PEG5 spacer enhances solubility and reduces immunogenicity, making it suitable for in vivo applications. The alkyne moiety facilitates click chemistry reactions, such as the copper-catalyzed azide-alkyne cycloaddition (CuAAC), enabling precise and efficient coupling with azide-containing molecules. This makes it a versatile tool in the synthesis of targeted therapeutics, diagnostic probes, and biomaterials.