The behavior upon flash pyrolysis is described for two neutral furazan compounds of stoichiometry R1R2C2N2O (R-1 = -NO2 or -NH2 and R-2 = -NHNO2) and four salts (Na+, NH4+, NH2NH3+, and NH3OH+) in which R-1= -NO2 and R-2 = -NNO2-. Highly exothermic decomposition occurred in all cases. Rapid-scan IR spectroscopy was used to quantify the IR-active gaseous products in real time, while mass spectrometry was used to identify N-2 and, in two cases, O-2. Good to excellent mass balance was obtained for each compound. Although only a few relationships exist between the stoichiometry and the decomposition characteristics, several compounds exhibit surprising and novel behavior. The most unusual behavior occurs when R-1 = -NO2 and R-2 = -N(H)NO2. Linear cyanogen-N-oxide NCCNO is formed by opening of the furazan ring and stripping of the substituents. A complex reaction between the substituents produces HNO3 and N-2 while leaving residual NO2, rather than producing N2O and HNO3 by a simple reaction.