2-Hydroxyphenylboronic acid pinacol ester is widely used in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions, where it serves as a key intermediate for constructing biaryl compounds. Its boronic ester group facilitates efficient coupling with aryl halides, making it valuable in the production of pharmaceuticals, agrochemicals, and advanced materials. Additionally, it is employed in the development of sensors and probes due to its ability to interact with diols and other biological molecules, enabling applications in biochemical research and diagnostics. The compound’s stability and reactivity also make it suitable for use in polymer chemistry and material science for modifying surfaces or creating functionalized polymers.