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Topic: UDMH

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	N2O4/UDMH
		UDMH is a clear, hygroscopic liquid which yellows on exposure to air.
		UDMH can be produced commercially by nitrosation of dimethylamine, to N-nitro-sodimethylrtmine, followed by reduction of the intermediate to UDMH and subsequent purification.
		UDMH can be prepared, also, by a modification of the Raschig process (see discussion of hydrazine), in which the chloramine intermediate is with dimethylamine rather than with ammonia.
	www.astronautix.com /props/n2o4udmh.htm (477 words)

	UDMH (unsymmetrical dimethylhydrazine)
		It has the chemical formula N(CH UDMH is often used instead of, or in mixtures with, hydrazine because it improves stability, especially at higher temperatures.
		UDMH is employed by many Russian, European, and Chinese rockets.
		The Titan family of launch vehicles and the second stage of the Delta use a fuel called Aerozine 50, which is a mixture of 50% UDMH and 50% hydrazine.
	www.daviddarling.info /encyclopedia/U/UDMH.html (131 words)

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