(2-Chloro-5-ethoxyphenyl)boronic acid is primarily used in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions. This reaction is widely employed in the pharmaceutical and materials science industries to form carbon-carbon bonds, enabling the synthesis of complex organic molecules. The compound serves as a key building block for creating biologically active compounds, such as drug candidates or agrochemicals. Its boronic acid group facilitates the coupling with aryl or vinyl halides, making it valuable in the development of new therapeutic agents or advanced materials. Additionally, it may be utilized in the preparation of sensors or catalysts due to its ability to interact with diols and other functional groups.