Benzyl-PEG7-azide is widely used in bioconjugation and click chemistry applications due to its azide functional group, which allows for efficient and selective reactions with alkyne-containing molecules. It serves as a linker in the synthesis of complex biomolecules, enabling the attachment of drugs, peptides, or proteins to other molecules or surfaces. This compound is particularly valuable in the development of targeted drug delivery systems, where it helps create stable and biocompatible conjugates. Additionally, it is utilized in the preparation of functionalized nanoparticles and polymers for biomedical research, diagnostics, and therapeutic applications. Its polyethylene glycol (PEG) chain enhances solubility and reduces immunogenicity, making it suitable for in vivo studies.