Nitrogen triple point
The nitrogen triple point is the unique temperature and pressure at which nitrogen can coexist as a solid, liquid, and gas.
How big is it?
63.15 K · temperature
Also -346 °F
Temperature · approximate
A little perspective
Nitrogen triple point vs Boiling nitrogen: temperature comparison
The nitrogen triple point is 14.21 K lower than the temperature of boiling nitrogen.
The nitrogen triple point is the unique temperature and pressure at which nitrogen can coexist as a solid, liquid, and gas.
Boiling nitrogen is nitrogen gas produced when liquid nitrogen is heated at normal atmospheric pressure.
Measurements, assumptions & sources +
Nitrogen triple point
Temperature: 63.15 K; approximate.
Nitrogen's triple point is an ITS-90 temperature fixed point. The assigned 63.151 K value is shown rounded to 63.15 K; realization depends on sample purity and conditions.
The ITS-90 nitrogen triple-point fixed value is 63.151 K; this record rounds it to 63.15 K.
NIST Technical Note 1265 — The International Temperature Scale of 1990 (ITS-90)
The marked temperature is calibrated. Unmeasured illustration details are representative.
Boiling nitrogen
Temperature: 77.36 K; approximate.
Approximate normal boiling point at one atmosphere.
NIST Chemistry WebBook — Nitrogen phase data
The marked temperature is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 63.15 K
We compare the nitrogen triple point. This is an estimate; check the notes for its rounding and uncertainty.
Nitrogen's triple point is an ITS-90 temperature fixed point. The assigned 63.151 K value is shown rounded to 63.15 K; realization depends on sample purity and conditions.
The ITS-90 nitrogen triple-point fixed value is 63.151 K; this record rounds it to 63.15 K.
The picture identifies the subject; the diagram compares the recorded values. How calibrated comparisons work →
Recorded properties
Dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 63.15 K | Not recorded | approximate |
Around this scale
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Compare examples with lower, similar and higher values. Each card names the measurement being compared.
Nearest lower valueTemperatureNeon normal boiling point27.1 KTemperatureNeon normal boiling point is the temperature at which neon transitions from liquid to gas under standard atmospheric pressure.Around the same scaleTemperatureArgon normal boiling point87.3 KNormal boiling temperatureArgon normal boiling point is the temperature at which argon transitions from liquid to gas under standard atmospheric pressure.Nearest higher valueTemperatureBoiling nitrogen77.36 KTemperatureBoiling nitrogen is nitrogen gas produced when liquid nitrogen is heated at normal atmospheric pressure.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- NIST Technical Note 1265 — The International Temperature Scale of 1990 (ITS-90)Defines ITS-90 fixed points, including the assigned nitrogen triple-point temperature of 63.151 K.
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Follow your curiosity.
TemperatureBoiling nitrogen77.36 KBoiling nitrogen is nitrogen gas produced when liquid nitrogen is heated at normal atmospheric pressure.TemperatureBoiling helium4.22 KBoiling helium is helium in its liquid state at its normal boiling point under standard atmospheric pressure.
TemperatureCosmic microwave background2.725 KThe cosmic microwave background is faint thermal radiation filling the universe, left over from the early stages after the Big Bang.TemperatureAbsolute zero0 KAbsolute zero is the lowest temperature permitted by thermodynamics, where a system has the least thermal energy available to it.TemperatureUltracold atom cloud1 × 10⁻⁷ KAn ultracold atom cloud is a collection of atoms cooled to temperatures near absolute zero, used in advanced physics experiments.TemperatureDry ice sublimation point-78.5 °CThe dry ice sublimation point is the temperature at which solid carbon dioxide turns directly into gas at standard atmospheric pressure.TemperatureArgon normal boiling point87.3 KArgon normal boiling point is the temperature at which argon transitions from liquid to gas under standard atmospheric pressure.TemperatureNeon normal boiling point27.1 KNeon normal boiling point is the temperature at which neon transitions from liquid to gas under standard atmospheric pressure.