Air
(Compressed)		 Home | Contact Us | Profile | Quote Request
Gas Mixtures | Refrigerants | Pure Gas
Equipment | Defense Services | Guest book

Periodic Chart | Incompatibility Chart | Atmospheric Chart | Reference

General Characteristics Health Hazards Material Recommendations

A colorless, nonflammable and odorless gas

Nonhazardous at atmospheric pressure

 Normal materials can be used
TLV-TWA Flammable Limits DOT Class / Label
None Established Nonflammable 2.2 / Nonflammable
Molecular Weight Specific Gravity Specific Volume
28.98 1.0 @ 70 F 13.3 cu.ft./lb @ 70 F
CGA Valve Outlet CAS Registry No. UN Number
590 1002
National Stock Number (NSN) Applicable to Air MIL Specs/ Fed Specs
MSDS for Air

Grade
Part #		 Purity Minimum Cylinder
Size		 Volume
SCF		 Pressure
@ 70 F		 Comments
Ultra Zero
405400 		<0.1 ppm THC 049
044
007
LBS		 280
225
30
2		 2400
2000
2000
1800		 None
Zero chromatographic
400300 		<0.5 ppm THC 049
044
007
LBS		 280
225
30
2		 2400
2000
2000
1800

None

CO2 Free
400500 		<5 ppm CO2 049
044
007
LBS		 280
225
30
2		 2400
2000
2000
1800

None

Zero
400400 		<1.0 ppm THC
 049
044
007
LBS		 280
225
30
2		 2400
2000
2000
1800

None

Dry
400600 		<10 ppm H2O 049
044
007
LBS		 280
225
30
2		 2400
2000
2000
1800

None

General: | Chart Detailed

Air is a mixture, the composition of which varies with the altitude at which the sample is taken, its composition begins to change materially above 62 miles. Since air is a mixture, there are two vapor pressure curves, one for the saturated liquid and the other for the saturated vapor. The average composition of dry air at surface altitudes is shown here:

Component Mole % Weight %
Nitrogen 78.084 75.521
Oxygen 20.946 23.139
Argon 0.934 1.288
Carbon Dioxide 0.033 0.050
Rare Gases 0.003 0.002

Last Updated: 98 AUG 01