Used in bioconjugation and click chemistry reactions, particularly in the synthesis of pharmaceutical intermediates and labeled biomolecules. Its azide group readily participates in copper-catalyzed azide-alkyne cycloaddition (CuAAC), enabling efficient attachment to alkynes for probe development, drug discovery, and biochemical assays. Commonly employed in the preparation of nicotinamide-based enzyme inhibitors and metabolic tracers. Also utilized in materials science for surface functionalization and polymer modification due to its reactivity and heterocyclic structure.