Used primarily as a reagent in organic synthesis, particularly in the preparation of heterocyclic compounds and pharmaceutical intermediates. It serves as a cyanoformate donor, enabling the introduction of cyano and ester functionalities into various substrates. Commonly applied in the synthesis of agrochemicals, dyes, and specialty polymers due to its ability to form carbon-carbon and carbon-nitrogen bonds. Also utilized in the production of certain pesticides and herbicides where nitrile and carbonate functionalities are required. Its high reactivity makes it valuable in laboratory-scale reactions for constructing complex molecules. Handle with extreme caution due to its corrosive nature and high toxicity.