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2-Dimethylaminoethylazide (DMAZ) is a liquid fuel being investigated for use as a spacecraft propellent to replace the toxic, carcinogenic monomethylhydrazine.
References
Mellor, B. (2004). "A Preliminary Technical Review of DMAZ: A Low-Toxicity Hypergolic Fuel". Proceedings of the 2nd International Conference on Green Propellants for Space Propulsion: 22. Bibcode:2004ESASP.557E..22M.