Used in the synthesis of sulfonamide derivatives for pharmaceutical research, particularly in developing compounds with potential antimalarial and antimicrobial activity. Acts as a key intermediate in organic synthesis, enabling the introduction of quinoline-based sulfonate groups into complex molecules. Employed in the preparation of fluorescent probes and dyes due to the inherent fluorescence of the quinoline scaffold. Also utilized in the development of kinase inhibitors and other biologically active agents in medicinal chemistry.