Energetic salts based on oxy-bridged bis(dinitromethyl)furazan (2) were synthesized and fully characterized by NMR (1H and 13C), IR spectroscopy, elemental analysis as well as differential scanning calorimetry (DSC). The crystal structures of neutral 2, its ammonium salt (4), guanidinium salt (7) and guanidylguanidinium salt (9) were also determined by single-crystal X-ray diffraction. Except for hydroxylammonium salt (5), all the remaining salts exhibit good thermal stabilities with decomposition temperature above 180 °C. Furthermore, the densities of salts ranged from 1.65 g cm-3 to 1.88 g cm-3. Theoretical calculations provided detonation pressures and velocities for the energetic salts within the range of 24.9-38.0 GPa and 7582.2-9072.7 m s-1, respectively.