UDMH

Unsymmetrical dimethylhydrazine (UDMH) (1,1-Dimethylhydrazine) is a hypergolic rocket fuel ingredient, often used as a bipropellant in combination with the oxidiser nitrogen tetroxide and less often with IRFNA or liquid oxygen. UDMH is a derivative of hydrazine and can be called a hydrazine also. As a fuel, it is described in specification MIL-D-25064.
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1,1-(unsymmetrical) dimethylhydrazine; a breakdown product of Alar.