1-Amino-4-methylpiperazine dihydrochloride 1-Piperazinamine, 4-methyl-, dihydrochloride 4-Methylpiperazin-1-ylamine dihydrochloride hydrate 40675-60-3 EINECS 255-031-4 Piperazine, 1-amino-4-methyl-, dihydrochloride