63918-49-0 ETHYLENEDIAMINE, N,N,N',N'-TETRAKIS(2-CHLOROETHYL)-, DIHYDROCHLORIDE N,N,N',N'-(Tetrakis(beta-chloroethyl))ethylenediamine dihydrochloride N,N,N'N'-Tetrakis(2-chloroethyl)ethylene diamine dihydrochloride