Title: supercritical fluid
Long Title: IUPAC Gold Book - supercritical fluid
DOI: 10.1351/goldbook.S06138
Status: current

Definition
The defined state of a compound, mixture or element above its critical pressure (\(p_{\rm{c}}\)) and critical temperature (\(T_{\rm{c}}\)).

Related Terms
- critical pressure: https://goldbook.iupac.org/terms/view/C01397
- critical temperature: https://goldbook.iupac.org/terms/view/C01402

Source
- PAC, 1993, 65, 2397. 'Nomenclature for supercritical fluid chromatography and extraction (IUPAC Recommendations 1993)' on page 2399 (https://doi.org/10.1351/pac199365112397)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/S06138/html
- json: https://goldbook.iupac.org/terms/view/S06138/json
- xml: https://goldbook.iupac.org/terms/view/S06138/xml

Citation: Citation: 'supercritical fluid' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.S06138
License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms.
Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .
Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2026-07-25T23:04:36+00:00