IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: 2-Propanol with Octane (n-octane) and Water

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Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 2-Propanol (isopropanol, isopropyl alcohol); C3H8O; [67-63-0]  NIST Chemistry WebBook for detail
   (3) Octane (n-octane); C8H18; [111-65-9]  NIST Chemistry WebBook for detail

Original Measurements:
   Vorobeva, A.I.; Karapetyants, M., Kh., Zh. Fiz. Khim. 41, 1984-9 (1967).

Variables:
   Temperature = 298 K

Prepared By:
   A. Skrzecz

Experimental Data:   (Notes on the Nomenclature)
  

Compositions along the saturation curve

t/°C	T/K	Mass Fraction w1	Mass Fraction w2	Mole Fraction x1 (compiler)	Mole Fraction x2 (compiler)
25	298.2	0.000	0.999	0.0000	0.9937
25	298.2	0.048	0.951	0.0870	0.9069
25	298.2	0.143	0.847	0.2299	0.7164
25	298.2	0.273	0.697	0.3690	0.4957
25	298.2	0.397	0.544	0.4511	0.3252
25	298.2	0.481	0.435	0.4858	0.2311
25	298.2	0.554	0.336	0.5047	0.1610
25	298.2	0.622	0.226	0.4984	0.0953
25	298.2	0.645	0.172	0.4792	0.0672
25	298.2	0.651	0.118	0.4388	0.0418
25	298.2	0.641	0.083	0.3993	0.0272
25	298.2	0.611	0.053	0.3472	0.0158
25	298.2	0.548	0.025	0.2760	0.0066
25	298.2	0.420	0.006	0.1796	0.0014

Compositions of coexisting phases

t/°C	T/K	Mass Fraction w1	Mass Fraction w2	Mole Fraction x1 (compiler)	Mole Fraction x2 (compiler)	Comment(s)
25	298.2	0.030	0.968	0.055	0.933	hydrocarbon-rich phase
25	298.2	0.096	0.898	0.163	0.803	hydrocarbon-rich phase
25	298.2	0.143	0.847	0.230	0.716	hydrocarbon-rich phase
25	298.2	0.184	0.801	0.281	0.643	hydrocarbon-rich phase
25	298.2	0.212	0.770	0.313	0.598	hydrocarbon-rich phase
25	298.2	0.320	0.644	0.411	0.435	hydrocarbon-rich phase
25	298.2	0.382	0.566	0.448	0.349	hydrocarbon-rich phase
25	298.2	0.416	0.522	0.464	0.306	hydrocarbon-rich phase
25	298.2	0.437	0.495	0.473	0.282	hydrocarbon-rich phase
25	298.2	0.352	0.002	0.1404	0.0004	water-rich phase
25	298.2	0.566	0.028	0.2925	0.0076	water-rich phase
25	298.2	0.645	0.092	0.4106	0.0308	water-rich phase
25	298.2	0.651	0.143	0.4606	0.0532	water-rich phase
25	298.2	0.641	0.180	0.4809	0.0711	water-rich phase
25	298.2	0.560	0.327	0.5050	0.1551	water-rich phase
25	298.2	0.496	0.416	0.4919	0.2170	water-rich phase
25	298.2	0.460	0.464	0.4804	0.2549	water-rich phase
25	298.2	0.437	0.495 (a)	0.473	0.282	water-rich phase

Notes:
   ^a  Critical point obtained graphically by the authors.

Method/Apparatus/Procedure:
   The experimental methods were described graphically in Ref. 1. Water impurity in alcohol were taken into account in the measurements. Critical point of liquid-liquid equilibrium was obtained graphically by the method reported in Ref. 2.

Source and Purity of Materials:
   (1) Source and method of preparation were reported in Ref. 1.
   (2) Source not specified; pure grade; distilled; water concentration was analyzed by the Karl Fischer method.
   (3) Doubly distilled.

Estimated Errors:
   Solubility: Not reported.
   Temperature: Not reported.

References:
   ¹ A. I. Vorobeva and M. Kh. Karapetyants, Zh. Fiz. Khim. 40, 3018 (1966).
   ² E. F. Zilberman, Zh. Fiz. Khim. 26, 1458 (1952).

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Last updated: February 18, 2015 (Created: August 17, 2007)