Abstract—The behavior of unsymmetrical dimethylhydrazine (UDMH), a highly toxic rocket fuel, has been studied in a supercritical water medium within a temperature range of 400–650°C by electrospray ionization high-resolution mass spectrometry. It has been established that thermal transformation leads to the formation of a wide range of products, including at least 350–400 nitrogen-containing compounds of CHN and CHNO-classes. The main products are nitrogen-containing heterocyclic compounds containing from one to three nitrogen atoms. Based on the accurate masses, the tentative identification of the most important components is given. It has been shown that 1-methyl-1H-1,2,4-triazole predominates among the transformation products at a temperature of 650°C; in this case, the predominant fraction of UDMH is converted into gaseous nitrogen.
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ACKNOWLEDGMENTS
This work was performed using the equipment of the Core Facility Center “Arktika” of the Lomonosov Northern (Arctic) Federal University.
Funding
This work was supported by the Ministry of Education and Science of the Russian Federation (projects nos. RFMEFI59417X0013 and 4.2518.2017/4.6), the Russian Foundation for Basic Research (grant no. 18-29-06018-mk), and the President of the Russian Federation (grant no. MK-4734.2018.3).
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Translated by E. Glushachenkova
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Kosyakov, D.S., Ul’yanovskii, N.V., Ivakhnov, A.D. et al. Transformation of Unsymmetrical Dimethylhydrazine in Supercritical Water. Russ. J. Phys. Chem. B 13, 1103–1110 (2019). https://doi.org/10.1134/S1990793119070157
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DOI: https://doi.org/10.1134/S1990793119070157