2-Chloro-5-cyano-4-methylphenylboronic acid is primarily used as a key intermediate in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions. This reaction is widely employed in the pharmaceutical industry to construct complex molecules, including drug candidates and bioactive compounds. Its boronic acid group enables efficient coupling with aryl halides, facilitating the formation of carbon-carbon bonds. Additionally, it finds applications in material science, where it is utilized to synthesize advanced polymers and organic electronic materials. Its unique structure, combining chloro, cyano, and methyl groups, allows for precise modifications in target molecules, making it valuable for developing specialized chemicals and functional materials.