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Veterinary medicine API Cimetidine Appearance White powder CAS NO. 51481-61-9 Molecular Formula C10H16N6S Molecular Weight  252.34 Density 1.27 g/cm3  Melting Point 139-144ºC Boiling Point 488ºC at 760 mmHg  Flash Point 248.9ºC Assay  98% min Cimetidine is an immunomodulator and a histamine congener. Cimetidine competitively inhibits histamine binding to histamine H2 receptors, and suppresses the growth of several tumors, including gastrointestinal cancer. This compo...