Used as a key reagent in organic synthesis, particularly in the preparation of heterocyclic compounds and pharmaceutical intermediates. It reacts with amines to form thiourea derivatives, which are valuable in the development of bioactive molecules, including potential drug candidates. Its isothiocyanate group readily participates in cycloaddition and condensation reactions, making it useful in the construction of complex ring systems. Also employed in the synthesis of agrochemicals and functional materials due to its ability to introduce both aromatic and functionalized sulfur-nitrogen moieties.