Used in bioconjugation and click chemistry, it serves as a linker for attaching biomolecules like peptides, proteins, or antibodies to other entities such as fluorescent dyes, drugs, or nanoparticles. The T-Boc group protects the aminooxy functionality during synthesis, while the propargyl group enables efficient alkyne-azide cycloaddition reactions. This compound is particularly valuable in drug delivery systems, diagnostic probes, and targeted therapies, where precise molecular attachment is crucial. Its PEG spacer enhances solubility and reduces steric hindrance, improving reaction efficiency and biocompatibility in biological applications.