Term: distribution coefficient https://doi.org/10.1351/goldbook.D01812 Definition: The term is not recommended as a synonym for the latter. Related Terms: 1) distribution constant (http://doi.org/10.1351/goldbook.D01813). 2) distribution ratio (in liquid-liquid distribution) (http://doi.org/10.1351/goldbook.D01817). Source: PAC, 1993, 65, 2373. 'Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)' on page 2381 (https://doi.org/10.1351/pac199365112373) Citation: 'distribution coefficient' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.D01812 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. 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.