Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the production of active ingredients for antihypertensive and anti-inflammatory drugs. Commonly employed in organic synthesis for constructing heterocyclic compounds such as indoles and quinolines. Frequently utilized in the preparation of agrochemicals, including herbicides and fungicides, due to its reactivity in coupling reactions. Serves as a building block in the development of dyes and fluorescent probes for biological imaging. Also applied in the manufacture of fragrances and flavoring agents where aromatic aldehyde derivatives are required.