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<h3>Overview</h3><p>4-Chloroquinoline-3-carboxylic acid is a heterocyclic intermediate synthesized via Vilsmeier-Haack formylation followed by oxidation. Its <strong>molecular formula</strong> is C10H6ClNO2 and <strong>CAS No.</strong> is 5798-47-0, serving as a key scaffold for fluoroquinolone antibiotics.</p><h3>Application</h3><ul><li>Pharmaceutical synthesis of broad-spectrum antibacterials</li><li>Agrochemical production of fungicidal agents</li><li>Research on kinase inhibitors in oncology</li></ul><h3>Precautions</h3><p>Store under inert atmosphere at 2-8°C. Avoid inhalation and skin contact; use appropriate PPE during handling to prevent respiratory irritation.</p>