The thermal decomposition products of five alkali metal dinitramides were examined by mass spectral and X-ray diffraction analysis. All five salt residues (Li, Na, K, Rb and Cs) showed no evidence of the parent dinitramide by mass spectrometry and showed only metal nitrate adducts to be present. X-ray diffraction patterns of the decay residues matched JCPDS reference patterns and confirmed that the dinitramide salts thermally decomposed to their respective alkali metal nitrate.