3(2H)-Pyridazinone, 6-(2-methyl-1H-imidazol-1-yl)-, hydrazone, dihydrochloride 3-Hydrazino-6-(2-methyl-1-imidazolyl)pyridazine dihydrochloride 78318-49-7 Pyridazine, 3-hydrazino-6-(2-methyl-1-imidazolyl)-, dihydrochloride