Azido-PEG7-amine is widely used in bioconjugation and chemical biology due to its azide functional group, which allows for efficient click chemistry reactions, particularly with alkynes. This compound is valuable in the modification of biomolecules, such as proteins, peptides, and nucleic acids, enabling the attachment of labels, probes, or other functional groups for research and diagnostic purposes. Its polyethylene glycol (PEG) spacer enhances solubility and reduces steric hindrance, making it ideal for applications in drug delivery systems, where it can be used to create PEGylated therapeutics with improved stability and pharmacokinetics. Additionally, it plays a role in material science for surface functionalization and the development of biocompatible materials.