Triple Point - Table of Triple Points

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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