2-Ethylbutanenitrile is primarily used as an intermediate in organic synthesis. It plays a significant role in the production of pharmaceuticals, where it serves as a building block for more complex molecules. Additionally, it is utilized in the manufacture of agrochemicals, contributing to the development of pesticides and herbicides. In the field of specialty chemicals, it is employed in the synthesis of dyes, resins, and other industrial compounds. Its reactivity and nitrile group make it a valuable component in various chemical reactions, including nucleophilic additions and reductions.