3-Cyanobiphenyl is an organic compound featuring a biphenyl core substituted with a cyano group at the 3-position. It is a solid at room temperature with a melting point around 50-52 °C. This compound is primarily utilized as a key intermediate or building block in the synthesis of advanced organic electronic materials. Its biphenyl structure provides rigidity and planarity, while the cyano group acts as a strong electron-withdrawing unit. This combination makes it valuable for constructing n-type organic semiconductors, electron-transport materials (ETMs), and specific chromophores used in organic light-emitting diodes (OLEDs) and other optoelectronic devices. As a versatile synthon, 3-cyanobiphenyl is also employed in various organic synthesis routes, particularly in cross-coupling reactions to introduce the cyanobiphenyl moiety into larger, more complex molecular architectures for material science research and development.