Used in bioconjugation and bioorthogonal chemistry due to its ability to participate in click reactions, particularly copper-catalyzed azide-alkyne cycloaddition (CuAAC). The azide group reacts selectively with alkynes to form stable triazole linkages, enabling labeling, detection, and immobilization of biomolecules such as peptides, proteins, and nucleic acids. Commonly employed in pharmaceutical research for drug discovery and development, especially in targeted delivery systems and probe design. Also utilized in material science for surface functionalization and polymer modification. Its stability under physiological conditions makes it suitable for in vitro and in vivo applications.