IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: 1-Proponal with Octane (n-octane) and Water

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) Octane (n-octane); C8H18; [111-65-9]  NIST Chemistry WebBook for detail

Original Measurements:
   Vorobeva, A.I.; Karapetyants, M., Kh., Zh. Fiz. Khim. 41, 1144 (1967).

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	298.2	0.000	0.999	0.0000	0.9937
25	298.2	0.164	0.823	0.2561	0.6762
25	298.2	0.288	0.678	0.3799	0.4705
25	298.2	0.435	0.496	0.4697	0.2818
25	298.2	0.493	0.420	0.4910	0.2200
25	298.2	0.600	0.261	0.4996	0.1143
25	298.2	0.611	0.241	0.4961	0.1030
25	298.2	0.625	0.199	0.4746	0.0795
25	298.2	0.632	0.138	0.4294	0.0493
25	298.2	0.610	0.089	0.3673	0.0282
25	298.2	0.576	0.062	0.3171	0.0180
25	298.2	0.492	0.029	0.2337	0.0072
25	298.2	0.477	0.028	0.2226	0.0069
25	298.2	0.409	0.015	0.1749	0.0034
25	298.2	0.380	0.011	0.1572	0.0024
25	298.2	0.255	0.002	0.0933	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	298.2	0.059	0.937	0.1044	0.8720	hydrocarbon-rich phase
25	298.2	0.066	0.930	0.1161	0.8605	hydrocarbon-rich phase
25	298.2	0.070	0.925	0.1221	0.8488	hydrocarbon-rich phase
25	298.2	0.090	0.904	0.1537	0.8121	hydrocarbon-rich phase
25	298.2	0.107	0.885	0.1785	0.7769	hydrocarbon-rich phase
25	298.2	0.128	0.862	0.2082	0.7376	hydrocarbon-rich phase
25	298.2	0.187	0.796	0.2823	0.6321	hydrocarbon-rich phase
25	298.2	0.274	0.695	0.3688	0.4921	hydrocarbon-rich phase
25	298.2	0.320	0.640	0.4050	0.4261	hydrocarbon-rich phase
25	298.2	0.339	0.616	0.4169	0.3985	hydrocarbon-rich phase
25	298.2	0.400	0.538	0.4495	0.3181	hydrocarbon-rich phase
25	298.2	0.318	0.004	0.1232	0.0008	water-rich phase
25	298.2	0.412	0.014	0.1765	0.0032	water-rich phase
25	298.2	0.490	0.028	0.2319	0.0070	water-rich phase
25	298.2	0.596	0.078	0.3456	0.0238	water-rich phase
25	298.2	0.625	0.111	0.3996	0.0373	water-rich phase
25	298.2	0.633	0.144	0.4358	0.0522	water-rich phase
25	298.2	0.606	0.251	0.4987	0.1087	water-rich phase
25	298.2	0.522	0.380	0.4977	0.1906	water-rich phase
25	298.2	0.476	0.442	0.4847	0.2368	water-rich phase
25	298.2	0.461	0.462	0.4798	0.2529	water-rich phase
25	298.2	0.400	0.538 (a)	0.4495	0.3181	water-rich phase

Notes:
   ^a  Critical solubility point.

Method/Apparatus/Procedure:
   The methods were reported in Ref. 1. The titration method was used to describe solubility of the mixtures. The third component was added to the binary homogeneous mixture until the cloudiness started to be observed. Density of the saturated mixtures was measured and put on the graphs. To obtain equilibrium ternary mixtures were stirred in thermostated vessel through several hours. After phase separation, density of each phase prepared graphs. Concentration at critical point was found by the method described in Ref. 2. Water include in propanol was taken into account in all measurements.

Source and Purity of Materials:
   (1) Source not specified, chemical pure grade; distilled; water concentrations was determined by the Karl Fischer method.
   (2) Source not specified; properties were the same as reported in Ref. 1.
   (3) Doubly distilled.

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

References:
   ¹ A. I. Vorobeva and M. Kh. Karapetyants, Zh. Fiz. Khim. 40, 3018 (1966).
   ² E. N. Zilberman, Zh. Fiz. Khim. 26, 1458 (1952).