Air

Air is a colourless, odourless, tasteless and non-toxic mixture of gases that surround the Earth. It is non-flammable, but does support combustion. The composition varies with the altitude at which the sample is taken, for example; the combination at sea level is approximately 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases.

Properties 

U.S. Units

S.I. Units

Chemical formula

Air

Air

Molecular weight

28.975

28.975

Density of the gas at 70°F (21.1°C) and 1atm

0.07493 lb/ft3

1.2000 kg/m3

Specific gravity of the gas at 70°F (21.1°C) and 1 atm (air=1)

1.00

1.00

Specific volume of the gas at 70°F (21.1°C) and 1 atm

13.346 ft3/lb

0.8333 m3/kg

Density of the liquid at boiling point and 1atm

54.56 lb/ft3

875.0 kg/m3

Boiling point at 1 atm

-317.8°F

-194.3°C

Freezing point at 1atm

-357.2°F

-216.2°C

Critical temperature

-221.1°F

-140.6°C

Critical pressure

547psia

37.7 bar

Critical density

21.9 lb/ft3

351.6 kg/m3

Solubility in water vol/vol at 32°F(0°C)

0.0292

0.0292

Industry

Usage

Diving

 Used in Diving Air Compressor, as a breathing gas

Construction

 Pneumatic drills

Labs & Analysis

Air is used to calibrate environmental emission monitoring, industrial hygiene monitors and trace impurity analyzers and as balance gas for some calibration mixtures. 
Air is used as combustion gases

Oil & Gas

Air or oxygen enriched air is used as oxidizing compound to burn sulfur to sulfur dioxide

Contact Us

Show Contact Form