This compound is primarily utilized in bioconjugation and chemical synthesis due to its functional groups. The azide (N3) group allows for click chemistry reactions, particularly copper-catalyzed azide-alkyne cycloaddition (CuAAC), which is widely employed in labeling biomolecules, drug delivery systems, and surface modifications. The PEG (polyethylene glycol) spacer enhances solubility and reduces immunogenicity, making it suitable for applications in drug development and protein modification. The tosyl (Tos) group serves as a leaving group in nucleophilic substitution reactions, enabling the attachment of various molecules, such as peptides, proteins, or small molecules, to create targeted conjugates. Its versatility makes it valuable in pharmaceutical research, material science, and biotechnological applications.