3-Bromobutyronitrile is primarily used as an intermediate in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. Its reactive bromine and nitrile groups make it a versatile building block for constructing more complex molecules. It is often employed in nucleophilic substitution reactions, where the bromine atom can be replaced by other functional groups, enabling the creation of diverse chemical structures. Additionally, it serves as a precursor in the synthesis of heterocyclic compounds, which are valuable in drug development. Its application extends to the preparation of specialty chemicals and fine chemicals used in various industrial processes.