Abstract N, N′-Dimethylhydrazine and several of its salts with energetic anions were synthesized and fully characterized by elemental analysis, DSC, mass spectrometry, multinuclear NMR (1 H, 13 C, and 15 N) spectroscopy, and vibrational (Raman, IR) spectroscopy. According to the DSC measurements, the compounds exhibit good thermal stabilities, and the nitrate (2) and dicyanamide (4) salts belong to the ionic-liquid type (ie, ...