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Liquid fluorine is essentially 100 per cent pure, containing only traces of oxygen, nitrogen, and hydrogen fluoride. The liquid exhibits a clear; yellow colour, while the gas has a pale greenish-yellow colour at ambient temperature. Fluorine is the strongest oxidising agent known. Under proper conditions, fluorine reacts with practically every element or compound except the inert gases. It is stable to shock, heat, and electric spark. It is non-flammable with air. Fluorine is highly toxic and irritating to all tissues. It has a characteristic pungent halogen odour and is irritating to the respiratory tract. Fluorine is produced from a molten mixture of HF and KF by an electrolytic procedure. The 1959 United. States production of liquid fluorine was estimated at 40,000 tonnes/year. Liquid fluorine's cost, ex-works, was then $ 6.00 per kg. In the Soviet Union Glushko founded a plant for production of fluorine propellants 23 km from Leningrad at Karlelsko. The population eventually reached 120,000, but although one engine was ready for production, this was never authorised due to the safety problems in case of a launch vehicle failure.
Oxidizer: LF2. Oxidizer: LF2. Fuel: LLi. Fuel: LLi. Propellant Formulation: LF2/LLi. Propellant Formulation: LF2+30%LH2/LLi. Temperature of Combustion: 2,200 deg K. Oxidizer Density: 1.510 g/cc. Oxidizer Density: 1.510 g/cc. Oxidizer Freezing Point: -219 deg C. Oxidizer Freezing Point: -219 deg C. Oxidizer Boiling Point: -188 deg C. Oxidizer Boiling Point: -188 deg C. Fuel Density: 6.940 g/cc. Fuel Density: 6.940 g/cc. Fuel Boiling Point: 180 deg C. Fuel Boiling Point: 180 deg C.
Specific impulse: 458 s.