4'-Propyl-4-biphenylboronic acid is primarily utilized in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions. This reaction is widely employed in the pharmaceutical and materials science industries to form carbon-carbon bonds, enabling the synthesis of complex organic molecules. The compound serves as a key intermediate in the production of liquid crystals, which are essential components in displays for electronic devices such as LCDs. Additionally, it is used in the development of organic semiconductors and advanced polymers, contributing to innovations in electronics and optoelectronics. Its boronic acid group also makes it valuable in the design of sensors and probes for detecting specific biological molecules.