4-Phenylbenzonitrile is widely used as an intermediate in the synthesis of various organic compounds, particularly in the pharmaceutical and agrochemical industries. It serves as a key building block in the production of active pharmaceutical ingredients (APIs) and fine chemicals. Its nitrile group allows for versatile chemical transformations, making it valuable in the development of dyes, pigments, and liquid crystals. Additionally, it is employed in materials science for the creation of polymers and advanced materials with specific optical or electronic properties. Its aromatic structure also makes it a useful component in research for studying molecular interactions and reaction mechanisms.