Table of Triple Points
This table lists the gas–liquid–solid triple points of common substances. Unless otherwise noted, the data comes from the U.S. National Bureau of Standards (now NIST).
| Substance | T | p * |
|---|---|---|
| Acetylene | 192.4 | 7002120000000000000 120 |
| Ammonia | 195.40 | 7000607590000000000 6.076 |
| Argon | 83.81 | 7001689000000000000 68.9 |
| Butane | 134.6 | 6996700000000000000 7 × 10−4 |
| Carbon (graphite) | 4765 | 7004101320000000000 10132 |
| Carbon dioxide | 216.55 | 7002517000000000000 517 |
| Carbon monoxide | 68.10 | 7001153700000000000 15.37 |
| Chloroform | 175.43 | 6999870000000000000 0.870 |
| Deuterium | 18.63 | 7001171000000000000 17.1 |
| Ethane | 89.89 | 6996800000000000000 8 × 10−4 |
| Ethanol | 150 | 6993429990000099999 4.3 × 10−7 |
| Ethylene | 104.0 | 6999120000000000000 0.12 |
| Formic acid | 281.40 | 7000220000000000000 2.2 |
| Helium-4 (lambda point) | 2.19 | 7000510000000099999 5.1 |
| Hexafluoroethane | 173.08 | 7001266000000000000 26.60 |
| Hydrogen | 13.84 | 7000704000000000000 7.04 |
| Hydrogen chloride | 158.96 | 7001139000000000000 13.9 |
| Iodine | 386.65 | 7001120700000000000 12.07 |
| Isobutane | 113.55 | 6995194810000000000 1.9481 × 10−5 |
| Mercury | 234.2 | 6993165009999999999 1.65 × 10−7 |
| Methane | 90.68 | 7001117000000000000 11.7 |
| Neon | 24.57 | 7001432000000000000 43.2 |
| Nitric oxide | 109.50 | 7001219200000000000 21.92 |
| Nitrogen | 63.18 | 7001126000000000000 12.6 |
| Nitrous oxide | 182.34 | 7001878500000000000 87.85 |
| Oxygen | 54.36 | 6999152000000000000 0.152 |
| Palladium | 1825 | 6997350000000000000 3.5 × 10−3 |
| Platinum | 2045 | 6996200000000000000 2.0 × 10−4 |
| Sulfur dioxide | 197.69 | 7000167000000000000 1.67 |
| Titanium | 1941 | 6997530000000000000 5.3 × 10−3 |
| Uranium hexafluoride | 337.17 | 7002151690000000000 151.7 |
| Water | 273.16 | 6999611700000000000 0.6117 |
| Xenon | 161.3 | 7001815000000000000 81.5 |
| Zinc | 692.65 | 6998650000000000000 0.065 |
* Note: for comparison, typical atmospheric pressure is 101.325 kPa (1 atm).
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