(4-Cyano-3-methylphenyl)boronic acid is an aromatic boronic acid derivative characterized by a cyano group and a methyl group on the benzene ring. It serves as a key organic synthesis building block, particularly in Suzuki-Miyaura cross-coupling reactions, which are pivotal for constructing biaryl structures. Its primary industrial application is in the field of materials science, specifically as a precursor or intermediate in the synthesis of organic electronic materials. The compound is utilized in the development of organic light-emitting diodes (OLEDs), organic photovoltaics (OPV), and other advanced optoelectronic devices. The boronic acid group enables efficient coupling to form complex conjugated systems, while the cyano and methyl substituents allow for fine-tuning of the electronic properties, solubility, and morphology of the resulting materials. As a specialized building block, it is commercially available from suppliers catering to the materials chemistry and fine chemical synthesis markets. Standard safety precautions for handling boronic acids and nitriles should be observed during laboratory use.