Hydrazine
RM-01
Credit - Boeing / Rocketdyne

Fuel: Hydrazine. Fuel Density: 1.008 g/cc. Fuel Freezing Point: 2.00 deg C. Fuel Boiling Point: 113 deg C.

Hydrazine (N2H4) found early use as a fuel, but it was quickly replaced by UDMH. It is still used as a monopropellant for satellite station-keeping motors. Hydrazine marketed for rocket propellant contains a minimum of 97 per cent N2H4, the other constituent being primarily water. Hydrazine is a clear, water-white, hygroscopic liquid. The solid is white. Hydrazine a toxic, flammable caustic liquid and a strong reducing agent. Its odour is similar that of ammonia, though less strong. It is slightly soluble in ammonia and methyl-amine. It is soluble in water, methanol, ethanol, UDMH, and ethylenediamine. Hydrazine is manufactured by the Raschig process, which involves the oxidation of ammonia to chloramine, either indirectly with aqueous sodium hypochlorite or directly with chlorine, and subsequent reaction of chloramine with excess ammonia. Raw materials include caustic, ammonia, and chlorine; these are high-tonnage, heavy chemicals. The cost of anhydrous hydrazine in drum quantities in 1959 was $ 7.00 per kg. The projected price, based on large-scale commercial production, was expected to be $ 1.00 per kg. Due to environmental regulations, by 1990 NASA was paying $ 17.00 per kg.

Engines Using Hydrazine
Engine
engineslink		 Thrust(vac)
kN		 Thrust(sl)
kN		 Isp
sec		 Isp (sea level)
sec		 Designed for Status
RM-01 0.000   91      
MR-508 0.000   502   Upper Stages In Production
MR-510 0.000   600   Upper Stages In Production
MR-509 0.000   502   Upper Stages In Production
MR-512 0.000   502   Upper Stages In Production
MR-501B 0.000   303   Upper Stages In Production
MR-502 0.001   304   Upper Stages In Production
REA 10 0.001       Upper Stages In Production
MRM-103 0.001   224   Upper Stages In Production
MR-103 0.001   227   Upper Stages In Production
REA 39-2 0.002       Upper Stages In Production
REA 17-6 0.002       Upper Stages In Production
MR-111 0.004   229   Upper Stages In Production
REA 17-12 0.004       Upper Stages In Production
DOT-5 0.005   230   Upper Stages In Production
DOK-10 0.010   229   Upper Stages In Production
REA 16 0.020       Upper Stages In Production
MR-50 0.022   228   Upper Stages In Production
DOT-25 0.025   235   Upper Stages In Production
MR-106 0.027   232   Upper Stages In Production
MRM-106 0.027   231   Upper Stages In Production
REA 22-5 0.050       Upper Stages In Production
DOK-50 0.050   229   Upper Stages In Production
MRE-15/OMV 0.089   225   Upper Stages In Production
REA 22-2 0.090       Upper Stages In Production
MR-120 0.090   229   Upper Stages In Production
REA 22-16 0.130       Upper Stages In Production
MRM-122 0.142   228   Upper Stages In Production
REA 22-17 0.178       Upper Stages In Production
MR-107 0.257   236   Upper Stages  
MR-104 0.441   239   Upper Stages In Production
REA 20-4 0.556       Upper Stages In Production
 
 
 
 
 
 
 
 
 
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