Argon
Purity	99.997%
Oxygen	Less than 0.0005%
Dew Point	Liquid Argon: -90ºF or lower
Helium
Purity	99.995% by volume
Combined total of the following impurities	Argon, carbon dioxide, carbon monoxide, hydrogen, hydrocarbons, oxygen, neon, and nitrogen shall not exceed 50 parts per million by volume
Dew Point	Liquid Helium: -90ºF or lower
Hydrogen – Liquid
Purity	99.999%
Oxygen	Less than 0.0002%
Dew Point	Liquid Hydrogen -105ºF or lower
Hydrogen – Gaseous
Purity	99.95%
Oxygen	Less than 0.0005%
Dew Point	-90ºF or lower
Nitrogen
Nitrogen and trace inerts	99.998%
Oxygen	Less than 0.001%
Dew Point	Liquid Nitrogen -90ºF or lower
Medical Nitrogen – meets Nitrogen NF
Nitrogen and trace inerts	99.0%
Oxygen	Not more than 1.0%
Carbon Monoxide	Less than 0.001%
Odor	None
Oxygen
Purity	99.5%
Inerts	Less than 0.5%
Dew Point	Liquid Oxygen: -80ºF or lower
Medical Oxygen – meets Oxygen USP
Oxygen	99.0%
Odor	None