A thermal study of the dinitramide salts of lithium, sodium, potassium, rubidium and cesium is presented. The series displayed a complex set of DSC exothermic decays with the exception of the lithium salt which showed two simple exothermic decomposition reactions. All five salts thermally decomposed to the equivalent nitrate salt as evidenced by DSC melting endotherms and TGA stoichiometric mass losses. Physical changes due to thermal heating were able to be followed by hot stage microscopy. Thermal decay was accompanied by gas evolution.