IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: 1-Proponal with Toluene and Water

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Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 1-Proponal (n-propanol, propyl alcohol, n-propyl alcohol); C3H8O; [71-23-8]  NIST Chemistry WebBook for detail
   (3) Toluene (methylbenzene); C7H8; [108-88-3]  NIST Chemistry WebBook for detail

Original Measurements:
   Nikurashina, N.I.; Ilin, K.K., Zh. Obshch. Khim. 42, 1657 (1972).

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	0.1996	0.0022	0.0697	0.0005
25.0	298.2	0.2953	0.0155	0.1134	0.0039
25.0	298.2	0.3731	0.0376	0.1579	0.0104
25.0	298.2	0.3841	0.0398	0.1647	0.0111
25.0	298.2	0.4042	0.0467	0.1783	0.0134
25.0	298.2	0.4130	0.0495	0.1845	0.0144
25.0	298.2	0.4216	0.0525	0.1908	0.0155
25.0	298.2	0.4327	0.0567	0.1991	0.0170
25.0	298.2	0.4654	0.0692	0.2256	0.0219
25.0	298.2	0.5180	0.0964	0.2774	0.0337
25.0	298.2	0.5529	0.1342	0.3283	0.0520
25.0	298.2	0.5700	0.1720	0.3695	0.0727
25.0	298.2	0.5666	0.2167	0.3960	0.0988
25.0	298.2	0.5581	0.2651	0.4226	0.1309
25.0	298.2	0.5284	0.3301	0.4346	0.1771
25.0	298.2	0.4842	0.4126	0.4412	0.2452
25.0	298.2	0.3843	0.5530	0.4028	0.3780
25.0	298.2	0.2896	0.6757	0.3423	0.5209
25.0	298.2	0.1966	0.7861	0.2563	0.6684
25.0	298.2	0.0994	0.8952	0.1417	0.8326

Distribution of 1-propanol in 1-propanol-toluene-water system

t/°C	T/K	Mass Fraction w1	Comment(s)
25.0	298.2	0.011	hydrocarbon-rich phase
25.0	298.2	0.038	hydrocarbon-rich phase
25.0	298.2	0.097	hydrocarbon-rich phase
25.0	298.2	0.150	hydrocarbon-rich phase
25.0	298.2	0.218	hydrocarbon-rich phase
25.0	298.2	0.290	hydrocarbon-rich phase
25.0	298.2	0.358	hydrocarbon-rich phase
25.0	298.2	0.423	hydrocarbon-rich phase
25.0	298.2	0.480	hydrocarbon-rich phase
25.0	298.2	0.527	hydrocarbon-rich phase
25.0	298.2	0.561	hydrocarbon-rich phase
25.0	298.2	0.571	hydrocarbon-rich phase
25.0	298.2	0.537	hydrocarbon-rich phase
25.0	298.2	0.507	hydrocarbon-rich phase
25.0	298.2	0.467	hydrocarbon-rich phase
25.0	298.2	0.056	water-rich phase
25.0	298.2	0.101	water-rich phase
25.0	298.2	0.130	water-rich phase
25.0	298.2	0.150 (a)	water-rich phase
25.0	298.2	0.155	water-rich phase
25.0	298.2	0.165	water-rich phase
25.0	298.2	0.174	water-rich phase
25.0	298.2	0.180	water-rich phase
25.0	298.2	0.188	water-rich phase
25.0	298.2	0.200	water-rich phase
25.0	298.2	0.211	water-rich phase
25.0	298.2	0.253	water-rich phase
25.0	298.2	0.291	water-rich phase
25.0	298.2	0.316	water-rich phase
25.0	298.2	0.351	water-rich phase

Notes:
   ^a  The same concentration of 1-propanol in both phases.

Method/Apparatus/Procedure:
   The isothermal titration method was used. Phase equilibrium was determined by the secants method. Each secant represented a constant water-toluene mass ratio, the concentration of 1-propanol was variable. After 24 h separation, refractive indexes of both phases were measured. Equilibrium concentration of 1-propanol in both phases, in weight percent, was reported for 15 tie lines.

Source and Purity of Materials:
   (1) Source not specified, chemically pure grade: used as received; b.p.=97.4°C, n(20°C,D)=1.3858.
   (2) Source not specified, pure for analysis grade; used as received; b.p.=110.6°C, n(20°C,D)=1.4967.
   (3) Freshly distilled water, n(20°C,D)=1.3332.

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

References:
   ¹ N. I. Nikurashina and R. V. Metslin, Method Sechenii (Izd. Saratovskii Universitet, Saratov, 1969).

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