Cyanoethylhydrazine is primarily used in the synthesis of various organic compounds, particularly in the production of pharmaceuticals and agrochemicals. Its reactive hydrazine group makes it a valuable intermediate in the creation of heterocyclic compounds, which are often key components in drug development. Additionally, it is employed in the preparation of dyes and pigments, where its chemical structure aids in forming stable colorants. In research, cyanoethylhydrazine serves as a reagent in organic synthesis, facilitating the construction of complex molecules. Its applications also extend to the field of polymer chemistry, where it is used to modify polymers, enhancing their properties for specific industrial uses.