Ethoxycarbonyl isothiocyanate is widely used in organic synthesis as a versatile reagent for introducing the isothiocyanate functional group into various molecules. It is particularly valuable in the preparation of thiourea derivatives, which are important intermediates in the development of pharmaceuticals, agrochemicals, and biologically active compounds. The compound is also employed in the synthesis of heterocyclic compounds, such as thiazoles and thiadiazoles, which have applications in medicinal chemistry due to their diverse biological activities. Additionally, it serves as a key building block in the production of dyes, pigments, and polymers, where its reactivity allows for the creation of complex structures with specific properties.