Unusual regularities are observed for decomposition of dinitramide metal salts in the solid phase: the solid-phase reaction is 10--103 times faster than that in the melt, its rate has a sharp peak in the ?egion of eutectics melting with the decomposition product (metal nitrate), and it is instantly inhibited by water vapor. In the inhibited regime, the rate in the solid phase is lower than that in the fiquid phase. No indications of this anomalous behavior are observed for the decomposition of the dinitramide guanidinium salt.It was found in the work I devoted to the study of the thermal decomposition of potassium dinitramide (KN(NO2)2) that on going from the melt to the solid state, the reaction rate does not decrease, as usually takes place for inorganic salts, 2 but, on the contrary, increases sharply. Water vapor inhibits the solid-phase reaction, and the decomposition of solid KN(NO2) ~ in the inhibited regime is considerably slower than in the melt. The study of the mechanism of this unusual reaction, which was named the anomalous decomposition, 1 can be facilitated by a detailed phenomenological description and establishment of its scope and limitations among dinitrarnide (DNA) salts. Therefore, in this work, we studied the liquid-and solid-phase decomposition of several metal DNA metal salts and one onium salt, dinitramide guanidinium.Note. a Calculated from the k values at 160 ~ presented in Ref. 6 assuming that logA/s -1 has the value 15.0 typical of alkaline salts.Data in Ref. 6. c Air pressure (Tort) above the sample, a Data of Refs. I and 3. e At 150 ~