2-Hydroxyphenylboronic acid is widely used in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions, where it serves as a key reagent for forming carbon-carbon bonds. Its boronic acid group enables efficient coupling with aryl halides, making it valuable in the production of pharmaceuticals, agrochemicals, and advanced materials. Additionally, it is utilized in the development of sensors and diagnostic tools due to its ability to interact with diols and sugars, making it useful in glucose detection and other biochemical assays. The compound also plays a role in polymer chemistry, where it contributes to the synthesis of functionalized polymers with specific properties.