Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of antihypertensive and antiviral drugs. Serves as a building block in the preparation of nitrogen-containing heterocyclic compounds, including ligands for metal catalysts. Employed in organic electronics for constructing conjugated systems due to its rigid aromatic structure and functional reactivity. Also utilized in the production of fluorescent dyes and sensors, where its aldehyde groups allow for easy modification to detect metal ions or biological molecules.