IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

---

 Solubility System: 2-Propanol with Cyclohexane and Water

---

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) Cyclohexane; C6H12; [110-82-7]  NIST Chemistry WebBook for detail

Original Measurements:
   Washburn, E.R., Brockway, C.E.; Graham, C.L.; Deming, P., J. Am. Chem. Soc. 64, 1886 (1942).

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)
25.0	298.2	0.0880	0.0014	0.0281	0.0003
25.0	298.2	0.2388	0.0032	0.0862	0.0008
25.0	298.2	0.3680	0.0108	0.1503	0.0032
25.0	298.2	0.4829	0.0481	0.2320	0.0165
25.0	298.2	0.5388	0.1046	0.2988	0.0414
25.0	298.2	0.5557	0.1627	0.3449	0.0721
25.0	298.2	0.5574	0.1897	0.3628	0.0882
25.0	298.2	0.5353	0.2685	0.3875	0.1388
25.0	298.2	0.4929	0.3597	0.3970	0.2069
25.0	298.2	0.4508	0.4356	0.3952	0.2727
25.0	298.2	0.3786	0.5502	0.3752	0.3894
25.0	298.2	0.2578	0.7140	0.2992	0.5917
25.0	298.2	0.1282	0.8698	0.1696	0.8216

Compositions of coexisting phases

t/°C	T/K	Mass Fraction w1	Mass Fraction w2	Mole Fraction x1 (compiler)	Mole Fraction x2 (compiler)	Comment(s)
25.0	298.2	0.000	1.000	0.0000	1.0000	hydrocarbon-rich phase
25.0	298.2	0.002	0.998	0.0028	0.9972	hydrocarbon-rich phase
25.0	298.2	0.013	0.986	0.0180	0.9773	hydrocarbon-rich phase
25.0	298.2	0.059	0.939	0.0801	0.9108	hydrocarbon-rich phase
25.0	298.2	0.112	0.885	0.1486	0.8382	hydrocarbon-rich phase
25.0	298.2	0.172	0.818	0.2179	0.7399	hydrocarbon-rich phase
25.0	298.2	0.258	0.714	0.2996	0.5920	hydrocarbon-rich phase
25.0	298.2	0.335	0.611	0.3521	0.4586	hydrocarbon-rich phase
25.0	298.2	0.044	0.002	0.0136	0.0004	water-rich phase
25.0	298.2	0.071	0.001	0.0224	0.0002	water-rich phase
25.0	298.2	0.154	0.005	0.0520	0.0012	water-rich phase
25.0	298.2	0.259	0.002	0.0950	0.0005	water-rich phase
25.0	298.2	0.326	0.009	0.1278	0.0025	water-rich phase
25.0	298.2	0.416	0.027	0.1814	0.0084	water-rich phase
25.0	298.2	0.521	0.080	0.2729	0.0299	water-rich phase
25.0	298.2	0.555	0.178	0.3529	0.0808	water-rich phase

Method/Apparatus/Procedure:
   The titration method, Refs. 1, 2, was used. Binary mixtures of known composition were titrated with the third component. The total weight of liquids employed was 13-15g. The refractive indexes of mixtures were used to construct the refractive index/composition curve, which was used further to find compositions of equilibrium phases.

Source and Purity of Materials:
   (1) Eastman Kodak Company, best grade; dried with active lime, distilled; d(25°C,4°C)=0.7808, n(25°C,D)=1.3749.
   (2) Eastman Kodak Company; distilled, dried with Na, recrystallized several times; d(25°C,4°C)=0.7746, n(25°C,D)=1.4232, f.p.=6.1°C.
   (3) Source not specified.

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

References:
   ¹ R. Vold and E. R. Washburn, J. Am. Chem. Soc. 54, 4217 (1932).
   ² E. R. Washburn and H. C. Spencer, J. Am. Chem. Soc. 56, 361 (1934).

---

Distributed by the Office of Data and Informatics of the National Institute of Standards and Technology (NIST) Material Measurement Laboratory (MML).
Website is owned by NIST (an agency of the U.S. Department of Commerce)

---

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