The denser phase in an @E02301@ system. This term is often used when two non-aqueous phases are present or when the solvent is an aqueous phase.
Source: PAC, 1993, 65, 2373. (Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)) on page 2381 [Terms] [Paper]
Citation: 'hypo-phase' in IUPAC Compendium of Chemical Terminology, 3rd ed. International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. https://doi.org/10.1351/goldbook.H02928 RISBibTexEndNote