Title: syneresis
Long Title: IUPAC Gold Book - syneresis
DOI: 10.1351/goldbook.S06227
Status: current

Definition
Spontaneous shrinking of a gel with exudation of liquid.

Note
Bond formation or attraction between particles or network chains within a gel induces the contraction and thereby the exudation of liquid from the network.

Related Terms
- gel: https://goldbook.iupac.org//terms/view/G02600
- network: https://goldbook.iupac.org//terms/view/NT07562

Source
- PAC, 2007, 79, 1801. 'Definitions of terms relating to the structure and processing of sols, gels, networks, and inorganic-organic hybrid materials (IUPAC Recommendations 2007)' on page 1826 (https://doi.org/10.1351/pac200779101801)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/S06227/html
- json: https://goldbook.iupac.org/terms/view/S06227/json
- xml: https://goldbook.iupac.org/terms/view/S06227/xml

Citation: Citation: 'syneresis' 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.S06227
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.
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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: 2026-05-28T04:35:24+00:00