 Definition:
Nitrogen (N2)
is a tasteless, odorless, colorless, gaseous chemical element
constituting ±78% of the atmosphere by volume. It is found
in all living organisms.
Toxicological Properties:
Nitrogen is inert and non-flammable. It is a simple asphyxiant
and will not support respiration. Large amounts in a confined
area could displace the amount of oxygen in air necessary to
support life. Contact with liquid (cryogenic) nitrogen
or cold piping containing liquid may cause tissue freezing or
frost bite.
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Physical Properties:
Nitrogen as used in ABC's
service lines is two nitrogen atoms bonded together.
Atomic Number: 7
Atomic Mass: 14
Molecular Weight: 28.016
Specific Gravity: Gas, .9670; Liquid, .809
Critical Temperature: 147.11° C, 296.8° F
Critical Preaaure: 492.2 psia
Weight Density: 0.0724 lbs/scf
Boiling Point: Liquid, -195.8° C, -320.44 F
Freezing Point: Liquid, -209.9° C, -345.8° F
Miscellaneous Data:
One volume of liquid nitrogen at its boiling point and atmospheric
pressure will vaporize into approximately 695 volumes of gaseous
nitrogen at 21.1° C (70° F) and one atmosphere.
DOT Labeling Information:
Shipping Name: Nitrogen Refrigerated Liquid
Shipping Label: Nonflammable Gas
I. D. No.: UN 1977
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