Title: retrograde solubility
Long Title: IUPAC Gold Book - retrograde solubility
DOI: 10.1351/goldbook.15354
Status: current

Definition
Solubility that decreases with an increase in conditions such as temperature or added component, where an increase is expected as the usual case.
In ternary liquid systems with coexisting phases, where the critical solution point is not a maximum on a ternary diagram, passing from a homogeneous mixture in which the composition of a given component is greater than that of the critical mixture to a heterogeneous mixture and back to a homogeneous mixture by altering the relative amounts of the two other components.

Related Terms
- component: https://goldbook.iupac.org//terms/view/16268
- ternary diagram: https://goldbook.iupac.org//terms/view/15365

Source
- PAC, 2008, 80, 233. 'Glossary of terms related to solubility (IUPAC Recommendations 2008)' on page 261 (https://doi.org/10.1351/pac200880020233)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/15354/html
- json: https://goldbook.iupac.org/terms/view/15354/json
- xml: https://goldbook.iupac.org/terms/view/15354/xml

Citation: Citation: 'retrograde solubility' 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.15354
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Accessed: 2026-07-27T04:58:33+00:00