6-Bromoquinoline-3-carboxylic acid is primarily used in organic synthesis as a key intermediate for the preparation of more complex chemical compounds. It is often employed in the development of pharmaceuticals, particularly in the synthesis of quinoline-based drugs that exhibit antimicrobial, antifungal, or anticancer properties. Additionally, this compound serves as a building block in the creation of ligands for metal-catalyzed reactions, which are essential in industrial and research applications. Its bromine substituent makes it a versatile reagent for further functionalization through cross-coupling reactions, enabling the production of diverse chemical structures.