03372 IUPAC Gold Book - katal 10.1351/goldbook.K03372 K03372 current unit 1 Unit for catalytic activity coherent with the SI, equal to the catalytic activity that catalyses a reaction rate of one mole per second in an assay system. \(\pu{1 kat} = \pu{1 mol s-1}\). The katal is recommended for use in the specific context of enzymes and clinical chemistry. assay https://goldbook.iupac.org/terms/view/A00470 enzymes https://goldbook.iupac.org/terms/view/E02159 mole https://goldbook.iupac.org/terms/view/M03980 PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 977 (https://doi.org/10.1351/pac199668040957) PAC, 1994, 66, 2587. 'Glossary of bioanalytical nomenclature - Part 1: General terminology, body fluids, enzymology, immunology (IUPAC Recommendations 1994)' on page 2595 (https://doi.org/10.1351/pac199466122587) https://goldbook.iupac.org/terms/view/K03372/html https://goldbook.iupac.org/terms/view/K03372/json https://goldbook.iupac.org/terms/view/K03372/plain Citation: 'katal' 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.K03372 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. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . 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. 2026-05-14T17:20:21+00:00