4-Hydroxyphenylboronic acid is widely used in organic synthesis as a key building block for creating complex molecules. It plays a significant role in Suzuki-Miyaura cross-coupling reactions, which are essential for forming carbon-carbon bonds in pharmaceuticals and advanced materials. In medicinal chemistry, it is utilized to develop bioactive compounds and drug candidates, particularly in targeting enzymes or receptors. Additionally, it serves as a sensor component in glucose detection systems due to its ability to bind diols, making it valuable in diabetes management tools. Its applications also extend to polymer chemistry, where it is used to design functional materials with specific properties.