Special gases
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ethane
specification
purity,% 99.5 99.995 99.999
oxygen ≤ 25 ppm ≤ 2 ppm ≤ 3 ppm
Nitrogen ≤ 100 ppm ≤ 5 ppm ≤ 1 ppm
Carbon monoxide + carbon dioxide ≤ 30 ppm ≤ 4 ppm ≤ 2 ppm
Other hydrocarbons ≤ 4000 ppm ≤ 40 ppm ≤ 6 ppm
Moisture ≤ 10 ppm ≤ 5 ppm ≤ 3 ppm

transport
DOT shipping name Ethane, compressibility
DOT classification 2.1
DOT tag flammable gas
UN NO. UN 1035
CAS NO. 74-84-9
CGA/JIS/BS341/DIN477 350/W22-14L/NO.2/NO.1
Transportation status Liquefied gas

Technical Information
Cylinder condition @ 21.1°C  liquid
Burning limit in the air 3–12.5 %
Auto-ignition temperature ( °C ) 515
Molecular weight ( g / mol ) 30.069
Specific gravity (air =1) 1.038
Critical temperature ( °C ) 32.27
Critical pressure ( psig ) 693.09

application
- for the manufacture of chemical intermediates; 
- for the measurement of ionization chambers on the measurement of subatomic substances; 
- for the preparation of standard gases;

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