Which chemical archaically called diamidogen was used in the Viking rocket engines?
Viking (rocket engine): The Viking rocket engines were members of a series of bipropellant engines for the first and second stages of the Ariane 1 through Ariane 4 commercial launch vehicles, using storable, hypergolic propellants, N2O4/UH 25 (mixture 75% UDMH and 25% Hydrazine.) Hydrazine: Hydrazine is an inorganic compound with the chemical formula N2H4 (also written H2NNH2 ), archaically called diamidogen.
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