| Medium |  | |  | critical state |  | triple point |  | normal boiling point1 |
molar weight | normalised gas density2 | temp. | pressure | density | temp. | pressure | sat. temp.
| liquid density
| heat of evaporation |
| kg/kmol | kg/Nm3 | K | MPa | kg/m3 | K | Pa | K | kg/m3 | kJ/kg |
 |
| air | | LAir | 28,963 | 1,293 | 132,5 | 3,766 | 313,0 | 60,1 | | 78,7 | 825,2 | 197,5 |
| nitrogen | N2 | LIN | 28,013 | 1,250 | 126,2 | 3,40 | 314,0 | 63,2 | 12530 | 77,4 | 808,6 | 198,6 |
| oxygen | O2 | LOX | 31,999 | 1,429 | 154,6 | 5,043 | 436,1 | 54,4 | 152 | 90,2 | 1141,0 | 212,9 |
| helium | He | LHe | 4,003 | 0,179 | 5,20 | 0,22746 | 69,6 | 2,1774 | 50354 | 4,22 | 125,0 | 20,4 |
| argon | Ar | LAr | 39,948 | 1,784 | 150,9 | 4,898 | 535,7 | 83,8 | 68906 | 87,3 | 1393,9 | 161,9 |
| neon | Ne | | 20,179 | 0,900 | 44,5 | 2,6638 | 482,9 | 24,6 | 43380 | 27,1 | 1207,1 | 85,9 |
| krypton | Kr | | 83,800 | 3,749 | 209,4 | 5,50 | 919,0 | 115,8 | 73055 | 119,8 | 2413,0 | 107,4 |
| xenon | Xe | | 131,300 | 5,900 | 289,7 | 5,84 | 1110,0 | 161,4 | 81668 | 165,1 | 2945,0 | 95,4 |
| carbon dioxyde | CO2 | | 44,010. | 1,977 | 304,2 | 7,3825 | 467,6 | 216,6 | 518500 | 194,73 | - | 573,03 |
| n-hydrogen | n-H2 | | 2,016 | 0,0899 | 33,2 | 1,315 | 30,12 | 14,0 | 7200 | 20,4 | 70,8 | 445,6 |
| p-hydrogen | p-H2 | | 2,016 | 0,0899 | 33,0 | 1,2916 | 31,43 | 13,8 | 7036 | 20,3 | 70,8 | 445,5 |
| methane | CH4 | LNG | 16,043 | 0,718 | 190,6 | 4,595 | 162,2 | 90,7 | 11719 | 111,6 | 422,5 | 510,4 |
| ethane | C2H6 | | 30,069 | 1,355 | 305,3 | 4,8714 | 204,0 | 90,4 | 11,308 | 184,6 | 544,1 | 488,8 |
| propane | C3H8 | | 44,096 | 2,011 | 369,8 | 4,24204 | 219,0 | 85,5 | 0,003 | 231,1 | 580,7 | 427,8 |
| n-butane | C4H10 | | 58,123 | 2,708 | 425,2 | 3,7961 | 227,0 | 134,9 | 0,6738 | 272,6 | 601,1 | 385,2 |
| | 1 | at 1013 hPa | | 3 | sublimation equilibrium |
| 2 | at 1013 hPa, 0°C | 4 | l-point |
|