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Each ampoule also contains D-mannitol 50 mg as an additive. pH 5.3-7.3. Osmotic Pressure (to physiological saline): Approximately 1. Mecobalamin is α-(5,6-dimethylbenzimidazolyl)-co-methyl-cobamide. Molecular Formula: C63H91CoN13O14P. Molecular Weight: 1344.4.
Mecobalamin occurs as dark red crystals or crystalline powder. It is slightly soluble in water, methanol and ethanol and practically insoluble in acetone, ether and chloroform. Mecobalamin is hygroscopic and is affected by light.
