1,1-Dimethylhydrazine, compd. with (2-chloroethyl)phosphonic acid (1:2) 73191-29-4 75034-93-4 Dihydrel Dimethylhydrazinium derivative of 2-chloroethylphosphonic acid Phosphonic acid, (2-chloroethyl)-, compd. with 1,1-dimethylhydrazine (2:1)