IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Indole with Biphenyl

Components:
   (1) Biphenyl; C12H10; [92-52-4]  NIST Chemistry WebBook for detail
   (2) Indole; C8H7N; [120-72-9]  NIST Chemistry WebBook for detail

Original Measurements:
   Yokoyama, C.; Ebina, T.; Takahashi, S., J. Chem. Eng. Data 1993, 38, 583-586.

Variables:
   Temperature = Temperature

Prepared By:
   W.E. Acree, Jr.

Experimental Data:   (Notes on the Nomenclature)


T/K	Mole Fraction x₁	Mole Fraction x₂	Comment(s)
343.13	0.0000	1.0000	Solid Phase (2)
335.36	0.1436	0.8564	Solid Phase (2)
328.51	0.2864	0.7136	Solid Phase (2)
323.66	0.3709	0.6291	Solid Phase (2)
318.19	0.4637	0.5363	Solid Phase (2)
312.57	0.5565	0.4435	Solid Phase (2)
308.08	0.6098	0.3902	Solid Phase (2)
304.01	0.6538	0.3462	Solid Phase (2)
301.45	0.6826	0.3174	Solid Phase (1)
301.76	0.6995	0.3005	Solid Phase (1)
306.45	0.7530	0.2470	Solid Phase (1)
310.08	0.8002	0.1998	Solid Phase (1)
317.55	0.8978	0.1022	Solid Phase (1)
326.26	1.0000	0.0000	Solid Phase (1)

Notes:
     Authors report eutectic point occurs at x₁ = 0.6815 and T/K = 300.71.

Method/Apparatus/Procedure:
   Constant temperature bath and a precision thermometer.
Mixtures of known concentrations sealed in glass ampoules and placed in constant temperature to equilibrate. Samples were rotated while bath temperature slowly increased. Solubility determined by visual noting the same temperature at which the last trace of solid solute disappeared.

Source and Purity of Materials:
   (1) 99.9%, Aldrich Chemical Company, Milwaukee, Wisconsin, USA, was used as received.
   (2) 99.9+ %, Wako Pure Chemical Ind Ltd., was dried over molecular sieves prior to use.

Estimated Errors:

   Temperature: T/K: precision ± 0.02. x₁: ± 0.0001.