Gas is lighter than air and is easily liquefied under pressure.
The sixth highest volume chemical produced in the United States. It is used directly on crops or as a building block for the manufacture of nitrogen rich fertilizers such as ammonium nitrate, ammonium sulfate, ammonium phosphate and urea. Used in the manufacture of nitric acid and in the fiber and plastic industry for the production of acrylonitrile, caprolactam, hexamethylenediamine, toluene 2,4-isocyanate and melamine. Found in the human body as a by-product of protein and nucleic acid metabolism, and is a minor component of the diet. Stable at normal temperatures.