Fuel: Amine.

Early storable rocket systems sought to improve ignition characteristics and perforamance by eliminating the kerosene portion of the fuel. Such mixed amine fuels were first developed by the Germans in World War II.

TONKA-250, developed for the Wasserfall rocket, was used by the Russians after the war in various engines under the specification TG-02.

TONKA-259 was 50% xylidine and 50% triethylamine by weight.