Hydrazine is an extremely toxic and unstable liquid with an ammonia-like odor. It has a wide explosive range (1.8–100%) and a low flash point of 52 °C. Its chief commercial use is as a blowing agent for plastics and metals; it also has many uses in synthesis and analytical procedures. Hydrazine has also been used as a rocket fuel, in part because it is hypergolic with N2O4, last week’s molecule. Recently, M. Stradiotto and R. J. Lundgren reported the use of a palladium catalyst to couple hydrazine with aryl groups.
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