Title: catalysed rate of reaction Long Title: IUPAC Gold Book - catalysed rate of reaction DOI: 10.1351/goldbook.C00873 Status: current Definition The observed rate of reaction, \(\xi \), minus the spontaneous rate of reaction, \(\xi _{0}\), observed under otherwise similar conditions in the absence of added catalytic material. Related Term - rate of reaction: https://goldbook.iupac.org//terms/view/R05156 Source - PAC, 1979, 51, 2451. 'Quantities and Units in Clinical Chemistry' on page 2464 (https://doi.org/10.1351/pac197951122451) Other Outputs - html: https://goldbook.iupac.org/terms/view/C00873/html - json: https://goldbook.iupac.org/terms/view/C00873/json - xml: https://goldbook.iupac.org/terms/view/C00873/xml Citation: Citation: 'catalysed rate of reaction' 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.C00873 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: 2026-05-09T13:44:36+00:00