Synonyms: N-(4-amino-3,6-dihydro-6-imino-1,3,5-triazin-2-yl)guanidine Dihydrochloride, (4,6-diamino-1,3,5-triazin-2-yl)guanidine Dihydrochloride, (4,6-Diamino-s-triazin-2-yl)guanidine, Dihydrochloride (Aminoiminomethyl)-1,3,5-triazine-2,4,6-triamine Dihydrochloride, Monoguanylmelamine Dihydrochloride, Metformin EP Impurity B