Used primarily as an intermediate in organic synthesis, especially in the preparation of heterocyclic compounds and pharmaceuticals. It participates in cyclization reactions to form indole and quinoline derivatives, which are important structures in medicinal chemistry. Also employed in the synthesis of fragrances and flavoring agents due to its aromatic characteristics. Its dual functional group reactivity (aldehyde and ketone) makes it valuable in forming Schiff bases and other condensation products used in dyes and coordination chemistry with metal ions.