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 such as antimicrobials, antivirals, and CNS-acting agents. Its isothiocyanate group readily participates in cycloaddition and condensation reactions, making it useful in the synthesis of agrochemicals, dyes, and functional materials. Also employed in coordination chemistry as a ligand precursor for metal complexes with catalytic or sensor applications. Additionally, it serves as a reagent for labeling proteins or peptides in biochemical research due to its reactivity with amine groups.