Title: reaction stage
Long Title: IUPAC Gold Book - reaction stage
DOI: 10.1351/goldbook.R05177
Status: current

Definition
A set of one or more (possibly experimentally inseparable) reaction steps leading to and/or from a detectable or presumed reaction intermediate.

Related Terms
- intermediate: https://goldbook.iupac.org/terms/view/I03096
- reaction steps: https://goldbook.iupac.org/terms/view/R05178

Source
- PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1159 (https://doi.org/10.1351/pac199466051077)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/R05177/html
- json: https://goldbook.iupac.org/terms/view/R05177/json
- xml: https://goldbook.iupac.org/terms/view/R05177/xml

Citation: Citation: 'reaction stage' 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.R05177
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.
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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: 2026-06-14T18:52:49+00:00