Term: colloidal carbon https://doi.org/10.1351/goldbook.C01173 Definition: A particulate carbon with particle sizes below ca.1000 nm in at least one dimension. Note: @C01172@ carbon exists in several morphologically distinct forms. Related Terms: 1) colloidal (http://doi.org/10.1351/goldbook.C01172). 2) particulate carbon (http://doi.org/10.1351/goldbook.P04433). Source: PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 486 (https://doi.org/10.1351/pac199567030473) Citation: 'colloidal carbon' 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.C01173 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.