Used as a reagent in organic synthesis, particularly for introducing azide groups into molecules. Commonly applied in the preparation of organic azides, which serve as intermediates in click chemistry reactions, especially the Cu(I)-catalyzed Huisgen cycloaddition to form triazoles. Also employed in the silylation of hydroxyl or amino groups, facilitating protection during multi-step syntheses. Its volatility and reactivity make it suitable for use in anhydrous conditions and inert atmosphere reactions. Additionally, it finds use in mass spectrometry as a derivatization agent for enhancing detection of certain functional groups.