Main Uses

Pharmaceutical Field:

Antimalarial Drug Intermediates: Used for synthesizing the side-chain structures of antimalarial drugs such as chloroquine and amodiaquine.

Photothermal Therapy Materials: Forms quinoline cyanine nanoparticles via self-assembly, used for cancer photoacoustic imaging and photothermal therapy; efficiently converts light energy into thermal energy under near-infrared light, achieving significant tumor suppression rates.

Anesthetics: Its sulfate (Quinaldine Sulfate) serves as an anesthetic in fish transport to reduce stress responses.

Dyes and Pigments:

Food Colorants: Synthesizes Quinoline Yellow WS (E104) for coloring beverages and confectionery; participates in the synthesis of basic dyes (e.g., pinacyanol).

pH Indicators: As a precursor to Quinaldine Red, used in acid-base titration (color change range pH 1.4-3.2, colorless → red).

Fine Chemicals:

Catalyst Ligands: Forms complexes with metals (e.g., palladium, rhodium) to catalyze coupling reactions (e.g., Heck reaction).

Rubber Auxiliaries: Synthesizes rubber vulcanization accelerators (e.g., 2-mercaptoquinoline) to improve the heat resistance of rubber.