Everything about Monomethylhydrazine totally explained
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Monomethylhydrazine (
MMH) is a
volatile hydrazine with the
chemical formula CH3N2H3. It is used as a
rocket fuel in
bipropellant rocket engines.
MMH is very commonly applied notably in the
OMS (orbital maneuvering system) engines of the
NASA Space Shuttle. The compound is
toxic and
carcinogenic, but easily stored in space providing moderate performance for very low tankage and fuel maintenance system weight. Recently the
European Space Agency has attempted to seek new options in terms of
propellant/
oxidizer combinations in order to avoid poisonous chemicals such as this and its relatives.
MMH and its relative
unsymmetrical dimethylhydrazine (UDMH) have a key advantage that they're stable enough to be used in regeneratively cooled
rocket engines.
It is also found in trace amounts in raw
Agaricus bisporus, the common mushroom in grocery stores, and in most members of the
mushroom genus Gyromitra, most notably the False Morel (
Gyromitra esculenta).
Further Information
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