12241 IUPAC Gold Book - cloud point 10.1351/goldbook.12241 12241 current 1 Point in the isobaric temperature-composition plane of a binary or multicomponent mixture at which a decrease in transparency is observed due to the turbidity caused by phase separation. A cloud point is characterized by the first appearance of turbidity or cloudiness. A cloud point can be induced by varying temperature or composition. A cloud point induced by varying temperature is heating-rate or cooling-rate dependent. PAC, 2015, 87, 71. 'Definitions of terms relating to individual macromolecules, macromolecular assemblies, polymer solutions, and amorphous bulk polymers (IUPAC Recommendations 2014)' on page 96 (https://doi.org/10.1515/pac-2013-0201) https://goldbook.iupac.org/terms/view/12241/html https://goldbook.iupac.org/terms/view/12241/json https://goldbook.iupac.org/terms/view/12241/plain Citation: 'cloud point' 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.12241 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. 2026-08-10T05:06:54+00:00