IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: 2-Methylhexane with Water

   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 2-Methylhexane; C7H16; [591-76-4]  NIST Chemistry WebBook for detail

Original Measurements:
   Krzyzanowska, T.; Szeliga, J., Nafta (Katowice) 1978, 12, 413-7.

   Temperature = One temperature: 25 °C

Prepared By:
   M.C. Haulait-Pirson

Experimental Remarks:

   The solubility of 2-methylhexane in water at 25°C was reported to be 2.54 mg(1)/kg(2).
The corresponding mass percent and mole fraction, x1, calculated by compiler are 2.54 x 10-4 g(1)/100 g sln and 4.57 x 10-7.

Editor's Note: Based on the results for this and other hydrocarbon-water systems, uncertainty exists about wether the datum compiled here is independent of that of Price for the same system (see previous page). Consequently, this system has not been evaluated.

Experimental Data:   (Notes on the Nomenclature)
   Saturated solutions of (1) in (2) were prepared in two ways. First, 200 microliters of (1) was injected into 20 mL of (2) and thermostatted at 25 °C. Second the mixture, of (1) and (2) as above was thermostatted at 70 °C and then cooled to 25 °C. The time required to obtain equilibrium was three weeks. The solubility of () in (2) was measured by glc. A Perkin-Elmer model F-11 gas chromatograph equipped with a 100-150 mesh Porasil column (70 °C) and a flame ionization detector was used. Saturated solutions of heptane in (2) were used as standard solutions.

Source and Purity of Materials:
   (1) not specified.
   (2) not specified.

Estimated Errors:
   Solubility: 0.09 mg(1)/kg(2) (standard deviation from 7-9 determinations)