BrF5/Hydrazine
Propellant
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BrF5/Hydrazine propellant. No engines reached the operational stage using this storable propellant combination. The handling problems and safety risks of the toxic bromine pentafluoride oxidizer outweighed the performance benefits. Hydrazine (N2H4) found early use as a rocket fuel, but it was quickly replaced by UDMH in most applications.
Optimum Oxidizer to Fuel Ratio: 3.35. Temperature of Combustion: 3,350 deg K. Density: 1.86 g/cc. Characteristic velocity c: 1,525 m/s (5,003 ft/sec). Isp Shifting: 243 sec. Oxidizer Density: 2.480 g/cc. Oxidizer Freezing Point: -63 deg C. Oxidizer Boiling Point: 41 deg C. Fuel Density: 1.008 g/cc. Fuel Freezing Point: 2.00 deg C. Fuel Boiling Point: 113 deg C.