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Helium, He Rare Gas

CAS NO 7440-59-7
UN NO 1963
EINECS NO 231-168-5
Molecular weight 4.0026
Appearance Colorless, odorless
Melting point -272.2℃
Boiling point -268.60 ℃
Density 0.1786kg/cm3
DOT Class 2.2
Label Non-flammable Gas
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Helium is a colorless, odorless, odorless, and gaseous atmospheric gas at normal temperature with the lowest critical temperature. It is the most difficult gas to liquefy found in nature. Ammonia gas has very low chemical activity and cannot be burned or combustible. Helium in the air is about 5.2 parts per million and can theoretically be extracted from the air, but it is so thin that it is expensive to separate. Liquid helium can be used for ultra-low temperature cooling with its low boiling point of -268.9 ℃.


Helium is essential for superconductor applications that are getting a lot of attention in areas like floating trains.

Helium gas is widely used in military industry, scientific research, petrochemical, refrigeration, medical treatment, semiconductor, pipeline leak detection, superconducting experiment, metal manufacturing, deep sea diving, high-precision welding, optoelectronic products production.

Helium is also commonly used as a filling gas in spaceships and advertising balloons because it is chemically inert and lighter than air.

Industrial Grade

Specification 99.999%
Nitrogen≤ 2.0 ppm
Oxygen + Argon≤ 1.0 ppm
Hydrogen≤ 1.0 ppm
Carbon Monoxide≤ 0.5 ppm
Carbon Dioxide≤ 0.5 ppm
Neon≤ 1.0 ppm
Methane≤ 0.5 ppm
Moisture≤ 0.5 ppm
Other Grades and Purity Available on Asking
Specification 99.9999%
Nitrogen≤ 0.5 ppm
Oxygen + Argon≤ 0.2 ppm
Carbon Monoxide≤ 0.1 ppm
Carbon Dioxide≤ 0.1 ppm
Methane≤ 0.1 ppm
Moisture≤ 0.2 ppm
Other Grades and Purity Available on Asking

Package Information

Cylinder CapacityValveVolumebarpsig
40LCGA5806 m31502175
47LCGA5807 m31502175
50LCGA58010 m32002900
Other Packages Available on Asking