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<h3>Overview</h3><p>Cimetidine is a histamine H2-receptor antagonist synthesized via condensation of cyanoguanidine and thiosemicarbazide derivatives. Its molecular formula is <strong>C10H16N4S</strong> with CAS No. <strong>51481-61-9</strong>.</p><h3>Application</h3><ul><li>Gastrointestinal therapy for peptic ulcers and GERD.</li><li>Industrial synthesis as an intermediate in pharmaceutical APIs.</li><li>Veterinary medicine for gastric acid reduction in livestock.</li></ul><h3>Precautions</h3><p>Requires strict dosage control to avoid hepatotoxicity. Store in cool, dry conditions below 25°C away from light. Handle with PPE to prevent skin irritation during manufacturing.</p>