Used in the synthesis of sulfonylurea herbicides such as chlorosulfuron and metsulfuron, which are commonly applied in rice fields and upland crops to control broadleaf and narrowleaf weeds. It functions as a key starting material in constructing the core structure of the active ingredients, enabling efficient and low-cost production. Additionally, it is employed in organic chemistry research to develop lead compounds for pharmaceuticals and other bioactive substances. Its aldehyde functional group facilitates easy modification in organic reactions, making it valuable in fine chemical synthesis. The aromatic structure and substituent pattern also support its use in the preparation of dyes and UV stabilizers.