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Pure Gases

With over 50 Pure Gases in more than 170 grades, whether in liquid, cryogenic or compressed gas form, specialty gases cover a wide range of products and applications. Whether you need sulfur hexafluoride (SF6) for electric transmission power insulation, hydrogen sulfide (H2S) for sour gas testing, hydrogen chloride (HCl) for cotton seed delinting or hydrocarbon mixtures for stove testing, Praxair can supply you with any of your specialty gas product needs.
Praxair Pure Gases

Readily Available Gas List*

Acetylene Deuterium134ANitrogen
AirDiborane 218 Nitrogen Dioxide 
Ammonia Dichlorosilane C318 Nitrogen Trifluoride 
ArgonDimethyl Ether Helium Nitrogen Oxide 
Arsine Disilane Hydrogen Oxygen 
Boron Trichloride Ethane Hydrogen BromidePhosphine
Boron Trifluoride Ethylene Hyrdogen Chloride Propane
1,3 Butadiene Ethylene Oxide Hydrogen Sulfide Propylene
n-Butane Germane Isobutane Silane
1-Butene Halocarbon Isobutylene Silicon Tetrachloride
cis-2-Butene 14Krypton Sulfur Dioxide
trans-2-Butene 22Methane Sulfur Hexafluoride
Carbon Dioxide 23 Methyl Chloride Trichlorosilane
Carbon Monoxide 41 NeonTungsten Hexafluoride
Chlorine 116 Nitric Oxide Xenon

*More gases available upon request. 

Nomenclature and Purity

Actual nomenclature will vary with difference in trade and grade names. One of the most important factors is the gas purity. While some products are defined by specific monikers such as UHP (Ultra-High Purity) or Research grades, actual purity level can be represented in two ways and usually represents the minimum purity level in the product:

Purity level can first be represented as a quality code, e.g. 4.5 – where the number before the dot represents the number of nines and the last number indicates the last decimal:

  • 4.5 = 99.995%
  • 5.7 = 99.9997%
  • 6.0 = 99.9999%

Purity level can also be represented in percent, e.g. > 99.9995%.

This typically represents the minimum concentration of the actual gas. In the case of liquefied gases, the purity always represents concentration in the liquid phase.

Impurities in the gas are sometimes even more important than the purity grade. Impurities usually result from the gas manufacturing process and, as such, vary by Gas and Gas Products. In the product specifications, the maximum concentrations of the different known impurities are listed in percentage, parts per million (ppm) or parts per billion (ppb), either in function of relative moles, weight or volume.

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Pure Gases Brochure

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