Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of antimalarial drugs. Its structure, featuring chloro and methoxy substituents, supports the formation of quinoline-based active ingredients that exhibit biological activity against Plasmodium species. Also employed in research for developing novel heterocyclic compounds with potential antimicrobial and anticancer properties. The aldehyde group allows for easy functionalization, making it valuable in medicinal chemistry for building more complex molecules through condensation and coupling reactions.