PROCESS OF PREPARING 2,2'-(1-METHYL-1,2-ETHANEDIYLIDENE)BIS¬HYDRAZINE CARBOXIMIDAMIDE

摘要

Process for the preparation of 2,2'-(1-methyl-1,2-ethanediylidine)bis[hydrazine carboximidamine] by a) removing impurities fromaminoguanidine bicarbonate; b) reacting the aminoguanidine bicarbonate withmethylglyoxal dimethylacetal in an aqueous isopropyl medium; and c) purifyingthe 2,2'-(1-methyl-1,2-ethanediylidene)bis[hydrazine carboximidamide] bycrystallization from an acidic aqueous-isopropanol medium.