distribution coefficient 

https://doi.org/10.1351/goldbook.D01812
The term is not recommended as a synonym for the latter.
See: distribution constant, distribution ratio (in liquid-liquid distribution)
Source:
PAC, 1993, 65, 2373. (Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)) on page 2381 [Terms] [Paper]
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 RIS BibTex EndNote
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Last revised: February 24, 2014