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C-Stoff ("C substance") was a reductant used in bipropellant rocket fuels developed by Helmuth Walter Werke in Germany during World War 2. It was developed for use with T-Stoff (a high test peroxide), which could also be ignited by a simple catalyst solution, Z-Stoff.

Methanol CH3OH ~57% by Weight
Hydrazine hydrate N2H4 . H2O ~30% by Weight
Water H2O ~13% by Weight
Catalyst 431 K3[Cu(CN)4]  

The proportions of the components in C-Stoff were developed to catalyse the decomposition of T-Stoff, promote combustion with the oxygen released by the decomposition, and sustain uniform combustion through sufficient quantity of the highly reactive hydrazine. The combination of the C-Stoff, used as a rocket fuel, with the T-Stoff used as the oxidizer, often resulted in spontaneous explosion from their combined nature as a hypergolic fuel combination, necessitating strict hygiene in fueling operations; there were numerous catastrophic explosions of the Messerschmitt Me 163 aircraft which employed this fuel system. Another hazard was toxicity to humans of each of the fuels.

See also

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "C-Stoff". A list of authors is available in Wikipedia.
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