1,1'-Dodecamethylenediguanidinium dichloride 61167-43-9 Dodecanediguanidine dihydrochloride EINECS 262-633-0 GUANIDINE, DODECANEDI-, DIHYDROCHLORIDE Guanidine, N,N'''-1,12-dodecanediylbis-, dihydrochloride Synthalin B