IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: 1-Pentanol with Hexane (n-hexane) and water

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Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 1-Pentanol (pentyl alcohol, amyl alcohol, n-amyl alcohol); C5H12O; [71-41-0]  NIST Chemistry WebBook for detail
   (3) Hexane (n-hexane); C6H14; [110-54-3]  NIST Chemistry WebBook for detail

Original Measurements:
   Gorovits, B.I.; Markuzin, N.P.; Lesteva, T.M.,Vestn. Leningr. Univ., Ser. 4: Fiz Khim. 4, 100 (1986).

Variables:
   Temperature = 298 K - 338 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)
-	298.2	0.1044	0.8947	0.102	0.8940	organic-rich phase
-	298.2	0.2071	0.7897	0.201	0.7838	organic-rich phase
-	298.2	0.3152	0.6767	0.301	0.6610	organic-rich phase
-	298.2	0.4145	0.5705	0.387	0.5448	organic-rich phase
-	298.2	0.4962	0.4808	0.451	0.447	organic-rich phase
-	298.2	0.5937	0.3709	0.518	0.331	organic-rich phase
-	298.2	0.6361	0.3207	0.541	0.279	organic-rich phase
-	298.2	0.6821	0.2646	0.562	0.223	organic-rich phase
-	298.2	0.7562	0.1736	0.592	0.139	organic-rich phase
-	298.2	0.7925	0.1263	0.601	0.098	organic-rich phase
-	298.2	0.9070	0.0000	0.666	0.000	organic-rich phase
-	298.2	0.006 33	0.000 10	0.0013	0.000 02	water-rich phase
-	298.2	0.008 75	0.000 09	0.0018	0.000 02	water-rich phase
-	298.2	0.010 67	0.000 09	0.0022	0.000 02	water-rich phase
-	298.2	0.013 07	0.000 09	0.0027	0.000 02	water-rich phase
-	298.2	0.015 46	0.000 09	0.0032	0.000 02	water-rich phase
-	298.2	0.017 37	0.000 09	0.0036	0.000 02	water-rich phase
-	298.2	0.019 27	0.000 09	0.0040	0.000 02	water-rich phase
-	298.2	0.021 17	0.000 09	0.0044	0.000 02	water-rich phase
-	298.2	0.023 05	0.000 05	0.0048	0.000 01	water-rich phase
-	298.2	0.025 88	0.000 05	0.0054	0.000 01	water-rich phase
-	298.2	0.028 69	0.000 00	0.0060	0.000 0	water-rich phase
-	318.2	0.0922	0.9067	0.090	0.9050	organic-rich phase
-	318.2	0.2036	0.7926	0.197	0.7846	organic-rich phase
-	318.2	0.3147	0.6767	0.300	0.6599	organic-rich phase
-	318.2	0.4147	0.5695	0.386	0.5422	organic-rich phase
-	318.2	0.4937	0.4804	0.444	0.442	organic-rich phase
-	318.2	0.5911	0.3713	0.512	0.329	organic-rich phase
-	318.2	0.6349	0.3202	0.537	0.277	organic-rich phase
-	318.2	0.6755	0.2663	0.548	0.221	organic-rich phase
-	318.2	0.7528	0.1739	0.584	0.138	organic-rich phase
-	318.2	0.7960	0.1168	0.593	0.089	organic-rich phase
-	318.2	0.9051	0.0000	0.661	0.000	organic-rich phase
-	318.2	0.007 78	0.000 10	0.0016	0.000 02	water-rich phase
-	318.2	0.010 19	0.000 09	0.0021	0.000 02	water-rich phase
-	318.2	0.012 11	0.000 09	0.0025	0.000 02	water-rich phase
-	318.2	0.014 99	0.000 09	0.0031	0.000 02	water-rich phase
-	318.2	0.017 37	0.000 09	0.0036	0.000 02	water-rich phase
-	318.2	0.019 74	0.000 09	0.0041	0.000 02	water-rich phase
-	318.2	0.021 17	0.000 09	0.0044	0.000 02	water-rich phase
-	318.2	0.024 94	0.000 09	0.0052	0.000 02	water-rich phase
-	318.2	0.026 35	0.000 05	0.0055	0.000 01	water-rich phase
-	318.2	0.028 22	0.000 05	0.0059	0.000 01	water-rich phase
-	318.2	0.031 49	0.000 00	0.0066	0.00 00	water-rich phase
-	338.2	0.0930	0.9057	0.0906	0.9030	organic-rich phase
-	338.2	0.2059	0.7899	0.199	0.7810	organic-rich phase
-	338.2	0.3121	0.6780	0.296	0.6578	organic-rich phase
-	338.2	0.4158	0.5677	0.386	0.5390	organic-rich phase
-	338.2	0.4918	0.4808	0.440	0.440	organic-rich phase
-	338.2	0.5933	0.3681	0.512	0.325	organic-rich phase
-	338.2	0.6349	0.3185	0.534	0.274	organic-rich phase
-	338.2	0.6710	0.2677	0.539	0.220	organic-rich phase
-	338.2	0.7491	0.1735	0.574	0.136	organic-rich phase
-	338.2	0.7862	0.1261	0.585	0.096	organic-rich phase
-	338.2	0.9044	0.0000	0.659	0.000	organic-rich phase

Compositions of coexisting phases

t/°C	T/K	Mass Fraction w1 (compiler)	Mass Fraction w2 (compiler)	Mole Fraction x1	Mole Fraction x2	Comment(s)
-	331.3	0.905	0.000	0.660	0.000	organic-rich phase
-	331.3	0.03055	0.00000	0.0064	0.00000	water-rich phase
-	303.3	0.751	0.175	0.581	0.139	organic-rich phase
-	303.3	0.02869	0.00005	0.0060	0.00001	water-rich phase
-	299.6	0.682	0.263	0.559	0.221	organic-rich phase
-	299.6	0.02305	0.00005	0.0048	0.00001	water-rich phase
-	298.2	0.636	0.321	0.541	0.279	organic-rich phase
-	298.2	0.01927	0.00009	0.0040	0.00002	water-rich phase
-	297.2	0.587	0.376	0.511	0.335	organic-rich phase
-	297.2	0.01927	0.00009	0.0040	0.00002	water-rich phase
-	296.4	0.494	0.482	0.448	0.447	organic-rich phase
-	296.4	0.01737	0.00009	0.0036	0.00002	water-rich phase

Method/Apparatus/Procedure:
   The analytical method was used. After separation both phases were analyzed. Water in the organic-rich phase was analyzed by the Karl Fischer method. The samples were analyzed by glc with propanol as the internal standard. A known amount of decane (about 10% by weight) was added to the water-rich phase and then after separation, samples of upper phase were analyzed by glc (the assumption was made that there was no hexane in  lower phase). Vapor pressures over the two-phase mixtures were measured by static method described in Ref. 1.

Source and Purity of Materials:
   (1) Source not specified; pure for analysis grade; twice distilled on a column of 20 theoretical plates, stored over zeolite; b.p.=411.2 K, d(20°C,4°C)=0.8145, n(20°C,D)=1.4102; the properties (b.p.,d,n) were in agreement with literature data.
   (2) Source not specified; pure for analysis grade; twice distilled on the column of 20 theoretical plates, stored over zeolite; b.p.=341.9 K, d(20°C,4°C)=0.6594, n(20°C,D)=1.3750; the properties (b.p., d,n) were in agreement with literature data.
   (3) Distilled water.

Estimated Errors:
   Solubility: Not reported.
   Temperature: Temp. ±0.1 K; relative errors of analysis: hexane and 1-pentanol in the water-rich phase, 20%-25% and 5%-7% respectively; water in the organic-rich phase, 3%.

References:
   ¹ I. A. Zvereva, I. M. Balashova, and N. A. Smirnova, Vestn. Leningr. Univ., Ser. 4: Fiz. Khim. 22, 107 (1977).

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