RFNA is a rocket fuel (a storeable oxidiser): red fuming nitric acid. HNO3 + 13% N2O4 and 3% H2O. The colour of the resulting red fuming nitric acid is imparted by N2O4, which breaks down partially to form NO2, the actual source of the color. Rocket fuel is the propellant which is burned to produce thrust in rockets. ... The chemical compound nitric acid (HNO3), otherwise known as aqua fortis, is a colorless, corrosive liquid, a toxic acid which can cause severe burns. ...
Usually used with an inhibitor (various, sometimes secret, substances - hydrogen fluoride is one - it is then referred to as IRFNA) because HNO3 attacks most container materials. Hydrofluoric acid is a highly corrosive solution of the chemical compound hydrogen fluoride in water. ...
It can also be a monopropellant; with substances like ammonium nitrates dissolved in it, it can be used as the sole fuel in a rocket. It is not normally used this way however. A (usually liquid) rocket propellant that can be used by itself, without the need for a second component. ...
More at: http://www.astronautix.com/props/nitidjpx.htm
Fumingnitricacid consists of a solution of nitrogen peroxide in concentrated nitricacid and is prepared by distilling dry sodium nitrate with concentrated sulphuric acid.
If a more dilute acid than this be distilled, water passes over in excess and the residue in the retort reaches the above composition and boiling point; on distillation of a stronger acid, excess of acid passes into the distillate and the boiling point rises until the values of the constant boiling mixture are reached.
In medicine, nitricacid is used externally in a pure state as a caustic to destroy chancres, warts and phagadenic ulcers; and diluted preparations are employed in the treatment of dyspepsia, andc.
Chief uses of nitricacid are in the preparation of fertilizers, e.g., ammonium nitrate, and explosives, e.g., nitroglycerin and trinitrotoluene (TNT).
Non-fertilizer uses of nitricacid: nitricacid is one of the basic chemical building blocks of the nitrogenous fertilizer industry, used in ammonium nitrate and nitrogen solutions as well as various NPK compounds.
Nitricacid absorption columns: a nitricacid absorption column is a pressure vessel, a mass transfer device and heat exchanger all rolled into one.
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