3-Ethylbenzonitrile is primarily used as an intermediate in the synthesis of various organic compounds. It plays a significant role in the production of pharmaceuticals, where it serves as a building block for active pharmaceutical ingredients (APIs). Additionally, it is utilized in the development of agrochemicals, contributing to the creation of pesticides and herbicides that enhance crop protection and yield. In the field of materials science, this compound is involved in the manufacture of specialty chemicals, including dyes, pigments, and polymers, which are essential for industrial applications. Its versatility in chemical reactions makes it a valuable component in research and development laboratories, particularly in the exploration of new chemical entities and processes.