1,2-Dimethylhydrazine dihydrochloride 306-37-6 Dimethylhydrazine dihydrochloride Dimethylhydrazinium dichloride Hydrazine, 1,2-dimethyl-, dihydrochloride N,N'-Dimethylhydrazine dihydrochloride NSC60518 WLN: 1MM1 & GH 2 sym-Dimethylhydrazine dihydrochloride