IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: 1-Butanol with Benzene and Water

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Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 1-Butanol (n-butanol, butyl alcohol, n-butyl alcohol); C4H10O; [71-36-3]  NIST Chemistry WebBook for detail
   (3) Benzene; C6H6; [71-43-2]  NIST Chemistry WebBook for detail

Original Measurements:
   Washburn, E.R; Strandskov, C.V., J. Phys. Chem. 48, 241 (1944)

Variables:
   Temperature = 298 K and 308 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	298.15	0.0988	0.8981	0.1025	0.8843
25.0	298.15	0.1656	0.8263	0.1685	0.7976
25.0	298.15	0.2119	0.7755	0.2120	0.7362
25.0	298.15	0.2546	0.7298	0.2518	0.6848
25.0	298.15	0.3306	0.6432	0.3152	0.5820
25.0	298.15	0.4006	0.5658	0.3724	0.4991
25.0	298.15	0.4397	0.5188	0.3987	0.4464
25.0	298.15	0.5108	0.4342	0.4445	0.3586
25.0	298.15	0.5645	0.3720	0.4789	0.2995
25.0	298.15	0.5955	0.3343	0.4956	0.2640
25.0	298.15	0.6397	0.2758	0.5121	0.2095
25.0	298.15	0.6960	0.2011	0.5312	0.1456
25.0	298.15	0.7480	0.1199	0.5323	0.0810
25.0	298.15	0.7840	0.0472	0.5147	0.0294
25.0	298.15	0.0358	0.0030	0.0090	0.0007
25.0	298.15	0.0237	0.0020	0.0059	0.0005
35.0	308.15	0.0681	0.9290	0.0708	0.9168
35.0	308.15	0.1129	0.8825	0.1165	0.8640
35.0	308.15	0.1632	0.8296	0.1665	0.8032
35.0	308.15	0.2379	0.7467	0.2356	0.7017
35.0	308.15	0.3389	0.6362	0.3243	0.5777
35.0	308.15	0.4063	0.5576	0.3748	0.4881
35.0	308.15	0.4607	0.4913	0.4097	0.4146
35.0	308.15	0.5626	0.3699	0.4722	0.2946
35.0	308.15	0.6071	0.3104	0.4892	0.2373
35.0	308.15	0.6829	0.2071	0.5127	0.1475
35.0	308.15	0.7406	0.1151	0.5130	0.0757
35.0	308.15	0.7747	0.0525	0.5045	0.0324
35.0	308.15	0.0508	0.0028	0.0129	0.0007
35.0	308.15	0.0190	0.0018	0.0047	0.0004

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	298.15	0.024	0.976	0.0253	0.9747	organic-rich phase
25.0	298.15	0.049	0.951	0.0515	0.9485	organic-rich phase
25.0	298.15	0.063	0.936	0.0659	0.9297	organic-rich phase
25.0	298.15	0.252	0.734	0.2505	0.6923	organic-rich phase
25.0	298.15	0.324	0.651	0.3102	0.5914	organic-rich phase
25.0	298.15	0.397	0.569	0.3687	0.5014	organic-rich phase
25.0	298.15	0.451	0.505	0.4059	0.4312	organic-rich phase
25.0	298.15	0.500	0.448	0.4390	0.3732	organic-rich phase
25.0	298.15	0.556	0.383	0.4750	0.3105	organic-rich phase
25.0	298.15	0.598	0.331	0.4966	0.2608	organic-rich phase
25.0	298.15	0.630	0.289	0.5091	0.2216	organic-rich phase
25.0	298.15	0.657	0.254	0.5197	0.1907	organic-rich phase
25.0	298.15	0.752	0.113	0.5316	0.0758	organic-rich phase
25.0	298.15	0.779	0.058	0.5177	0.0366	organic-rich phase
25.0	298.15	0.036	0.962	0.0376	0.9538	organic-rich phase
25.0	298.15	0.086	0.910	0.0890	0.8939	organic-rich phase
25.0	298.15	0.153	0.841	0.1568	0.8179	organic-rich phase
25.0	298.15	0.213	0.774	0.2128	0.7338	organic-rich phase
25.0	298.15	0.288	0.693	0.2813	0.6423	organic-rich phase
25.0	298.15	0.346	0.629	0.3309	0.5708	organic-rich phase
25.0	298.15	0.419	0.543	0.3842	0.4725	organic-rich phase
25.0	298.15	0.497	0.449	0.4340	0.3720	organic-rich phase
25.0	298.15	0.546	0.391	0.4642	0.3154	organic-rich phase
25.0	298.15	0.587	0.338	0.4826	0.2637	organic-rich phase
25.0	298.15	0.645	0.260	0.5029	0.1924	organic-rich phase
25.0	298.15	0.694	0.190	0.5135	0.1334	organic-rich phase
25.0	298.15	0.764	0.075	0.5102	0.0475	organic-rich phase
25.0	298.15	0.019	0.002	0.0047	0.0005	water-rich phase
25.0	298.15	0.025	0.002	0.0062	0.0005	water-rich phase
25.0	298.15	0.029	0.002	0.0072	0.0005	water-rich phase
25.0	298.15	0.038	0.003	0.0095	0.0007	water-rich phase
25.0	298.15	0.041	0.003	0.0103	0.0007	water-rich phase
25.0	298.15	0.045	0.004	0.0114	0.0010	water-rich phase
25.0	298.15	0.049	0.003	0.0124	0.0007	water-rich phase
25.0	298.15	0.050	0.004	0.0127	0.0010	water-rich phase
25.0	298.15	0.053	0.003	0.0135	0.0007	water-rich phase
25.0	298.15	0.055	0.003	0.0140	0.0007	water-rich phase
25.0	298.15	0.058	0.003	0.0148	0.0007	water-rich phase
25.0	298.15	0.060	0.003	0.0153	0.0007	water-rich phase
25.0	298.15	0.064	0.003	0.0164	0.0007	water-rich phase
25.0	298.15	0.067	0.002	0.0172	0.0005	water-rich phase
25.0	298.15	0.017	0.002	0.0042	0.0005	water-rich phase
25.0	298.15	0.027	0.003	0.0067	0.0007	water-rich phase
25.0	298.15	0.031	0.003	0.0077	0.0007	water-rich phase
25.0	298.15	0.035	0.002	0.0088	0.0005	water-rich phase
25.0	298.15	0.038	0.002	0.0095	0.0005	water-rich phase
25.0	298.15	0.040	0.003	0.0100	0.0007	water-rich phase
25.0	298.15	0.044	0.003	0.0111	0.0007	water-rich phase
25.0	298.15	0.046	0.003	0.0116	0.0007	water-rich phase
25.0	298.15	0.049	0.003	0.0124	0.0007	water-rich phase
25.0	298.15	0.051	0.003	0.0129	0.0007	water-rich phase
25.0	298.15	0.053	0.002	0.0134	0.0005	water-rich phase
25.0	298.15	0.058	0.002	0.0148	0.0005	water-rich phase
25.0	298.15	0.065	0.000	0.0166	0.0000	water-rich phase

Method/Apparatus/Procedure:
   Solubilities were determined by titration of weighed solutions to permanent appearance of a second phase. Observations were made with both reflected and transmitted light and against a light or dark background. The titrant was added from a pipet which ended with in fine capillary; the amount added was determined by weight. The total mass of the mixture was 18-25 g. Refractive indexes of saturated solutions were measured and plotted as a  function of concentration. Tie-lines were determined by adding alcohol in varying amounts to binary water-benzene mixtures. After separation, refractive indexes of conjugate layers were determined and the concentrations were read from the plots.

Source and Purity of Materials:
   (1) Eastman Kodak Co., better grade; dried by refluxing over active lime, distilled; d(25°C,4°C)=0.806 49.
   (2) Coleman and Bell, reagent quality grade; dried with Na, crystallized several times; f.p.=5.45°C.
   (3) Doubly distilled over KMnO₄.

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

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