Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) for central nervous system (CNS) drugs and antipsychotic medications. Its functionalized aromatic structure allows for selective cross-coupling reactions, making it valuable in medicinal chemistry for building complex molecules. It is also employed in the preparation of agrochemicals, including herbicides and fungicides, due to its reactivity and stability in multi-step organic transformations. Additionally, it serves as a building block in the creation of fluorescent probes and dyes, where the aldehyde group enables attachment to larger conjugated systems.