IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Biphenyl with n-Heptane

Components:
   (1) n-Heptane; C7H16; [142-82-5]  NIST Chemistry WebBook for detail
   (2) Biphenyl; C12H10; [92-52-4]  NIST Chemistry WebBook for detail

Original Measurements:
   Warner, J.C.; Scheib, R.C.; Svirbely, W.J., J. Chem. Phys. 1934, 2, 590-594.

Variables:
   Temperature = Temperature

Prepared By:
   W. E. Acree, Jr.

Experimental Data:   (Notes on the Nomenclature)


T/K	Mole Fraction x₁	Mole Fraction x₂
299.7	0.140	0.860
308.4	0.216	0.784
313.1	0.274	0.726
316.3	0.335	0.665
319.9	0.409	0.591
322.2	0.468	0.532
322.3	0.475	0.525
328.5	0.665	0.335
330.7	0.726	0.284
332.7	0.803	0.197
333.7	0.806	0.194
334.8	0.836	0.164
335.7	0.857	0.143
337.2	0.892	0.108
339.2	0.934	0.066
341.3	0.972	0.028

Method/Apparatus/Procedure:
   Constant temperature bath and a precision thermometer. Solubilities were measured using a dynamic method. Mixtures of known concentrations were sealed in thick-walled glass tubes and placed in a constant temperature to equilibrate with gentle rotation to thoroughly mix contents. Bath temperature was slowly increased and solubility visually determined by noting the temperature at which the last trace of solid solute disappeared. Measurements repeated several times to verify results.

Source and Purity of Materials:
   (1) Purity not specified, Eastman Kodak Company, Rochester, New York, USA, was recrystallized three times from alcohol.
   (2) Purity not specified, Eastman Kodak Company, was used as received.

Estimated Errors:
   Solubility: x₁: ± 0.002 (compiler).
   Temperature: T/K: precision ± 0.1.

References:
   ¹W.E. Acree, Jr.