Nitrogen
N2
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General Characteristics Health Hazards Material Recommendations

A colorless, nonflammable and odorless gas.

A simple asphyxiant

Normal materials can be used
TLV-TWA Flammable Limits DOT Class / Label
None Established Nonflammable 2.2 / Nonflammable
Molecular Weight Specific Gravity Specific Volume
28.0 0.967 @ 77 F 13.8 cu.ft./lb @ 70 F
CGA Valve Outlet CAS Registry No. UN Number
580 7727-37-9 1066
National Stock Number (NSN) Applicable to Nitrogen
CFC Specifications Chart
MIL Spec / Fed Specs
MSDS for Nitrogen


Grade
Part #
Purity Minimum Cylinder
Size
Volume
SCF
Pressure
@ 70 F
Comments
Research
406300
99.9995% Min. 049
044
002
304
210
4
2640
2000
2000

None

Ultra High
403700
99.999% Min. 049
044
016
007
304
210
80
34
2640
2000
2000
2000

None

Zero
403800
99.998%
<0.5 ppm THC
049
044
016
007
304
210
80
34
2640
2000
2000
2000

None

Oxygen Free
404000
99.98%
<0.5 ppm O
2
049
044
016
007
304
210
80
34
2640
2000
2000
2000

None

Prepurified
430900
99.998% 049
044
016
007
304
210
80
34
2640
2000
2000
2000

None

High Purity
403900
99.995% 049
044
016
007
304
210
80
34
2640
2000
2000
2000

None

Industrial/Welding 99.5% 049
044
016
007
304
210
80
34
2640
2000
2000
2000

Uses: Nitrogen - N2 - at room temp and atmospheric pressure, nitrogen is a colorless, odorless, nontoxic, nonflammable gas. It constitutes 78% by volume of the atmosphere. Naturally occurring nitrogen contains two isotopes, 14N and 15N. Used as an inert gas in electrical systems, chemical and food packaging industry. Used in the drying and preparation of refrigeration systems.