IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Ethanol with 2,2,4-Trimethylpentane (isooctane) and Water

Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 2,2,4-Trimethylpentane (isooctane); C8H18; [540-84-1]  NIST Chemistry WebBook for detail
   (3) Ethanol (ethyl alcohol); C2H6O; [64-17-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Huber, J.F.K.; Meijers, C.A.M.; Hulsman, J.A.R., J. Anal. Chem. 44, 111 (1972).

Variables:
   Temperature = 298 K

Prepared By:
   A. Skrzecz

Experimental Data:   (Notes on the Nomenclature)

Compositions of coexisting phases
t/°C	T/K	Mass Fraction w₁ (compiler)	Mass Fraction w₂ (compiler)	Mole Fraction x₁	Mole Fraction x₂	Comment(s)
25.0	298.2	0.162	0.833	0.317	0.658	hydrocarbon-rich phase
25.0	298.2	0.063	0.935	0.142	0.847	hydrocarbon-rich phase
25.0	298.2	0.055	0.943	0.126	0.865	hydrocarbon-rich phase
25.0	298.2	0.040	0.959	0.093	0.900	hydrocarbon-rich phase
25.0	298.2	0.025	0.974	0.059	0.935	hydrocarbon-rich phase
25.0	298.2	0.015	0.984	0.037	0.961	hydrocarbon-rich phase
25.0	298.2	0.639	0.301	0.700	0.133	water-rich phase
25.0	298.2	0.740	0.140	0.671	0.051	water-rich phase
25.0	298.2	0.750	0.065	0.601	0.021	water-rich phase
25.0	298.2	0.723	0.030	0.529	0.009	water-rich phase
25.0	298.2	0.639	0.011	0.416	0.003	water-rich phase
25.0	298.2	0.514	0.009	0.296	0.002	water-rich phase

Method/Apparatus/Procedure:
   Equilibrium was established in a thermostat vessel with a magnetic stirrer and the composition of each of the phases was determined analytically by glc. Data were obtained during measurements of partition coefficients for steroids in liquid-liquid systems.

Source and Purity of Materials:
   (1) Merck Uvasole, spectroquality grade; used as received.
   (2) Merck Uvasole, spectroquality grade; used as received.
   (3) Double distilled.

Estimated Errors:
   Solubility: Not reported.
   Temperature: Temp. ±0.1°C.