Present in most mammalian tissues; primarily stored in mast cells and basophils. Exhibits multiple biological effects through at least 3 specific receptors. Induces bronchoconstriction and vasodilation; stimulates gastric acid secretion; and acts as a neurotransmitter.Synonyms:1H-Imidazole-4-ethanamine Dihydrochloride; 2-(1H-Imidazol-4-yl)ethanamine Dihydrochloride; 2-(1H-Imidazol-4-yl)ethylamine Dihydrochloride; 4-(2-Aminoethyl)imidazole Dihydrochloride; Ceplene; Histamine Chloride; Histamine Dichloride; Histamine Hydrochloride; Histaminediium Dichloride; PereminCAS No:56-92-8Molecular Formula:C5H9N3·2HClMolecular Weight:184.07Appearance:White to colorless crystals or powderPurity:≥98% (TLC)Melting Point:245-250°CSolubility:Methanol, WaterSulfur Compounds:≤0.1%pH:2.8-3.6Infrared Spectrum:Conforms to structureLoss on Drying:≤0.5%Sulfated Ash:≤0.1%Storage Temp: Store at 4°C
