IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Heptane with Water
Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) Heptane; C7H16; [142-82-5]  NIST Chemistry WebBook for detail
Original Measurements:
   McCants, J.F.; Jones, J.H.; Hopson, W.H., Ind. Eng. Chem. 1953, 45, 454-6.

 Variables:
   Temperature = One temperature: 100 °F (311 K)

 Prepared By:
   G.T. Hefter

 Experimental Remarks:
   The solubility of n-heptane in water at 100°F (311 K) was reported to be < 0.1 g(1)/100 g sl. The corresponding mole fraction, x1, calculated by the compiler, is < 2 x 10-4.
The solubility of water in n-heptane at 100°F (311 K) was reported to be 0.12 g(2)/100 g sln. The corresponding mole fraction, x2, calculated by the compiler, is 6.6 x 10-3.

 Experimental Data:   (Notes on the Nomenclature)
   Method/Apparatus/Procedure:
   The method was essentially that of ref. 1 and involved titration of the second component to the cloud point, in a constant temperature bath.

 Source and Purity of Materials:
   (1) Phillips; pure grade; used without further purification; nD20 1.3974.
   (2) Distilled.

 Estimated Errors:

   Temperature: Not specified.

 References:
   1Washburn, E.R.; Hnizda, V.; Vold, R.D., j. Am. Chem. Soc. 1931, 53, 3232.