1,1'-Ethylenediguanidine dihydrochloride 13282-14-9 EINECS 236-289-7 Ethylenebis(guanidinium) dihydrochloride GUANIDINE, 1,1'-ETHYLENEDI-, DIHYDROCHLORIDE Guanidine, N,N'''-1,2-ethanediylbis-, dihydrochloride N,N'''-Ethylenebisguanidine dihydrochloride