Nitrogen constitutes 78% of the atmosphere and is a constituent of all living tissues. Under normal conditions, nitrogen is a colorless, odorless and tasteless inert gas which has no toxic properties and is slightly lighter than air. As a liquid at -320 ºF it has a water-white appearance and must be handled with care due to its low temperature.
Liquid Nitrogen is classified as Type II by the Compressed Gas Association (CGA). CGA-10.1, Type II, Grade L or The National Formulary Specs (similar to USP) are considered commercial liquid nitrogen standards.
Nitrogen
(Units in ppm (v/v) unless show otherwise)
* N2 includes trace quantities of neon, helium and small quantities of argon.
Currently the United States Department of Agriculture (USDA) has no specification for liquid nitrogen in food applications. However, the Food and Drug Administration (FDA) considers nitrogen a G.R.A.S. substance, Generally Regarded As Safe as a good additive.
Nitrogen is also available in high purity VLSI grade for customers requiring stringent purity standards.
Keen guarantees commercial grade product delivered as a liquid meets the commercial CGA specification listed. Keen does not normally guarantee commercial grade product delivered as a compressed gas meets the gaseous specification listed because gas purities are affected by normal cylinder filling practices and process procedures which may compromise the integrity of the product.
Nitrogen Conversion Data
|
Nitrogen
|
Weight
|
Gas
|
Liquid
|
|
Pounds
|
Kilograms
|
Cubic Feet
|
Cubic Meters
|
Gallons
|
Liters
|
|
Lb
|
Kg
|
SCF
|
Nm3
|
Gal
|
L
|
|
1 Pound |
1
|
0.4536
|
13.803
|
0.3627
|
0.1481
|
0.5606
|
|
1 Kilogram |
2.205
|
1
|
30.42
|
0.7996
|
0.3262
|
1.2349
|
|
1 Ton |
2000
|
907.2
|
27606
|
725.4
|
296.2
|
1121
|
|
1 SCF Gas |
0.07245
|
0.03286
|
1
|
0.02628
|
0.01074
|
0.04065
|
|
1 Nm3 Gas |
2.757
|
1.2506
|
38.04
|
1
|
0.408
|
1.5443
|
|
1 Gal Liquid |
6.745
|
3.06
|
93.11
|
2.447
|
1
|
3.785
|
|
1 L Liquid |
1.782
|
0.8083
|
24.6
|
0.6464
|
0.2642
|
1
|
SCF (standard cubic foot) and SM3 (standard cubic meter) gas measured at 1 atmosphere and 70ºF.
Liquid measured at 0ºF and saturated pressure.
Nm3 (normal cubic meter) gas measured at 1 atmosphere and 0ºC.
All values round to the nearest 4/5 significant numbers.
