IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

---

 Solubility System: Ethanol with Toluene and Water

---

Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) Ethanol (ethyl alcohol); C2H6O; [64-17-5]  NIST Chemistry WebBook for detail
   (3) Methylbenzene (toluene); C7H8; [108-88-3]  NIST Chemistry WebBook for detail

Original Measurements:
   Ricna, K.; Matous, J.; Novak, J.P.; Kubicek, V., Collect. Czech. Chem. Commun. 54, 581 (1989).

Variables:
   Temperature = 278 K

Prepared By:
   A. Skrzecz

Experimental Data:   (Notes on the Nomenclature)
  

Compositions along the saturation curve

t/°C	T/K	Mass Fraction w1 (compiler)	Mass Fraction w2 (compiler)	Mole Fraction x1	Mole Fraction x2
5.0	278.15	0.8857	0.0732	0.8620	0.0356
5.0	278.15	0.7719	0.1281	0.7072	0.0587
5.0	278.15	0.6306	0.2302	0.5725	0.1045
5.0	278.15	0.3875	0.4261	0.3597	0.1978
5.0	278.15	0.2280	0.5711	0.2220	0.2780
5.0	278.15	0.0832	0.7443	0.0928	0.4151
5.0	278.15	0.0196	0.7814	0.0213	0.4251

Compositions of coexisting phases

t/°C	T/K	Mass Fraction w1 (compiler)	Mass Fraction w2 (compiler)	Mole Fraction x1	Mole Fraction x2	Comment(s)
5.0	347.7	0.0000	0.9988	0.0000	0.9938	hydrocarbon-rich phase
5.0	347.7	0.0000	0.9957	0.0000	0.9783	hydrocarbon-rich phase
5.0	347.7	0.0000	0.9953	0.0000	0.9763	hydrocarbon-rich phase
5.0	347.7	0.0000	0.9887	0.0000	0.9447	hydrocarbon-rich phase
5.0	347.7	0.0000	0.9753	0.0000	0.8855	hydrocarbon-rich phase
5.0	347.7	0.0000	0.9588	0.0000	0.8197	hydrocarbon-rich phase
5.0	347.7	0.0039	0.9298	0.0061	0.7283	hydrocarbon-rich phase
5.0	347.7	0.0185	0.8763	0.0255	0.6037	hydrocarbon-rich phase
5.0	347.7	0.0276	0.8501	0.0361	0.5554	hydrocarbon-rich phase
5.0	347.7	0.0354	0.8274	0.0442	0.5171	hydrocarbon-rich phase
5.0	347.7	0.0550	0.7935	0.0655	0.4727	hydrocarbon-rich phase
5.0	347.7	0.0916	0.7267	0.0996	0.3951	hydrocarbon-rich phase
5.0	347.7	0.9971	0.0026	0.9980	0.0013	water-rich phase
5.0	347.7	0.9886	0.0104	0.9921	0.0052	water-rich phase
5.0	347.7	0.9887	0.0102	0.9919	0.0051	water-rich phase
5.0	347.7	0.9898	0.0072	0.9888	0.0036	water-rich phase
5.0	347.7	0.9818	0.0101	0.9744	0.0050	water-rich phase
5.0	347.7	0.9732	0.0108	0.9546	0.0053	water-rich phase
5.0	347.7	0.9351	0.0346	0.9080	0.0168	water-rich phase
5.0	347.7	0.8988	0.0496	0.8516	0.0235	water-rich phase
5.0	347.7	0.8786	0.0654	0.8331	0.0310	water-rich phase
5.0	347.7	0.8508	0.0879	0.8091	0.0418	water-rich phase
5.0	347.7	0.8478	0.0793	0.7895	0.0369	water-rich phase
5.0	347.7	0.8028	0.1106	0.7435	0.0512	water-rich phase
25.0	298.15	0.0000	0.9986	0.0000	0.9930	hydrocarbon-rich phase
25.0	298.15	0.0000	0.9949	0.0000	0.9745	hydrocarbon-rich phase
25.0	298.15	0.0000	0.9869	0.0000	0.9364	hydrocarbon-rich phase
25.0	298.15	0.0042	0.9532	0.0072	0.8082	hydrocarbon-rich phase
25.0	298.15	0.0119	0.9059	0.0176	0.6710	hydrocarbon-rich phase
25.0	298.15	0.0117	0.8994	0.0170	0.6530	hydrocarbon-rich phase
25.0	298.15	0.0219	0.8767	0.0305	0.6093	hydrocarbon-rich phase
25.0	298.15	0.0454	0.8222	0.0571	0.5171	hydrocarbon-rich phase
25.0	298.15	0.0806	0.7686	0.0947	0.4518	hydrocarbon-rich phase
25.0	298.15	0.1026	0.7399	0.1172	0.4227	hydrocarbon-rich phase
25.0	298.15	0.1136	0.7203	0.1265	0.4009	hydrocarbon-rich phase
25.0	298.15	0.9967	0.0028	0.9973	0.0014	water-rich phase
25.0	298.15	0.9941	0.0040	0.9932	0.0020	water-rich phase
25.0	298.15	0.9794	0.0144	0.9770	0.0072	water-rich phase
25.0	298.15	0.9245	0.0473	0.9062	0.0232	water-rich phase
25.0	298.15	0.8706	0.0702	0.8236	0.0332	water-rich phase
25.0	298.15	0.8817	0.0623	0.8349	0.0295	water-rich phase
25.0	298.15	0.8327	0.0975	0.7857	0.0460	water-rich phase
25.0	298.15	0.7892	0.1254	0.7374	0.0586	water-rich phase
25.0	298.15	0.6808	0.2065	0.6349	0.0963	water-rich phase
25.0	298.15	0.6670	0.2152	0.6200	0.1000	water-rich phase
25.0	298.15	0.6669	0.2149	0.6194	0.0998	water-rich phase
50.0	323.15	0.0000	0.9986	0.0000	0.9928	hydrocarbon-rich phase
50.0	323.15	0.0000	0.9982	0.0000	0.9908	hydrocarbon-rich phase
50.0	323.15	0.0000	0.9935	0.0000	0.9674	hydrocarbon-rich phase
50.0	323.15	0.000	0.9905	0.0000	0.9534	hydrocarbon-rich phase
50.0	323.15	0.0016	0.9877	0.0030	0.9447	hydrocarbon-rich phase
50.0	323.15	0.0027	0.9586	0.0047	0.8252	hydrocarbon-rich phase
50.0	323.15	0.0041	0.9491	0.0067	0.7929	hydrocarbon-rich phase
50.0	323.15	0.0051	0.9353	0.0081	0.7481	hydrocarbon-rich phase
50.0	323.15	0.0219	0.9055	0.0331	0.6856	hydrocarbon-rich phase
50.0	323.15	0.0213	0.8894	0.0306	0.6403	hydrocarbon-rich phase
50.0	323.15	0.0307	0.8716	0.0428	0.6082	hydrocarbon-rich phase
50.0	323.15	0.0807	0.7977	0.1021	0.5045	hydrocarbon-rich phase
50.0	323.15	0.1041	0.7613	0.1256	0.4592	hydrocarbon-rich phase
50.0	323.15	0.1387	0.7175	0.1603	0.4146	hydrocarbon-rich phase
50.0	323.15	0.9860	0.0055	0.9757	0.0027	water-rich phase
50.0	323.15	0.9752	0.0147	0.9672	0.0073	water-rich phase
50.0	323.15	0.9000	0.0571	0.8669	0.0275	water-rich phase
50.0	323.15	0.8598	0.0906	0.8333	0.0439	water-rich phase
50.0	323.15	0.8342	0.1023	0.7961	0.0488	water-rich phase
50.0	323.15	0.8126	0.1162	0.7719	0.0522	water-rich phase
50.0	323.15	0.7755	0.1393	0.7294	0.0655	water-rich phase
50.0	323.15	0.7379	0.1637	0.6888	0.0764	water-rich phase
50.0	323.15	0.5546	0.3231	0.5390	0.1570	water-rich phase
50.0	323.15	0.4574	0.4085	0.4553	0.2033	water-rich phase
50.0	323.15	0.3218	0.5284	0.3320	0.2726	water-rich phase

Method/Apparatus/Procedure:
   The titration method was used for solubility measurements. Water was added from a calibrated hypodermic syringe (controlled by a micrometer screw) to a binary ethanol-toluene mixture of known mass and composition until persistent turbidity was observed. The direct analytical method was used for liquid-liquid equilibrium measurements. A mixture was stirred vigorously for 2-3 h in a thermostated cell, ¹ and after phase separation samples were taken for analysis. A  were taken for analysis. A small amount of tetrahydrofuran was added as an internal standard and homogenization agent in glc analysis. Calibration standards were analyzed separately for each phase prior to each sample analysis by glc. Conditions of the glc analysis were: glass column (2.5 mm I.d., 1.5 m), Poropak Q, 200°C, carrier gas H₂, thermal conductivity detector.

Source and Purity of Materials:
   (1) Source not specified "extra fine," distilled with benzene; 0.1% H₂O by the Karl Fischer method; p(25°C)=0.784 98 g cm^-3, n(25°C,D)=1.3605.
   (2) Lachema Neratovice, A. R. grade; shaken five times with H₂SO₄ conc., three times with H₂O, then with NaOH, dried Na, distilled; p(25°C)=0.861 24 g/cm³, n(25°C,D)=1.4939.
   (3) Doubly distilled.

Estimated Errors:
   Solubility: Not reported.
   Temperature: Temp. ±0.05 K.

---

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)