IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Hexane with Water
Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) Hexane; C6H14; [110-54-3]  NIST Chemistry WebBook for detail
Original Measurements:
   Roddy, J.W.; Coleman, C.F., Talanta 1968, 15, 1281-6.

 Variables:
   Temperature = One temperature: 25 °C

 Prepared By:
   M.C. Haulait-Pirson

 Experimental Remarks:
   The solubility of water in hexane at 25 °C was reported to be 0.00362 mol(2) dm-3 sln corresponding to a mole fraction, x2, of 4.76 x 10-4. The corresponding mass percent value calculated by the compiler is 0.00995 g(2)/100 g sln.
The compiler's calculation assumes a solution density of 0.6629 g/mL (the density of hexane reported in ref 1).

 Experimental Data:   (Notes on the Nomenclature)
   Method/Apparatus/Procedure:
   A method of gravimetric absorption monitored by tritium tracer was used. (1) was equilibrated with a slight excess of titrated water by shaking over a period of at least 8 hr in a thermostat. The phases were allowed to separate for at least 16 hr and then were sampled for tritum analysis. Most of the (1) phase was weighed into a boiling flask of a closed distillation system and then distilled through a magnesium perchlorate weighing tube. The magnesium perchlorate was then dissolved for measurement of its tritium content with a Pckard Tri-Carb Scintillation Spectrometer.

 Source and Purity of Materials:
   (1) Phillips Petroleum Co.; 99%; purified by shaking with concentrated sulphuric acid, washed with water and dried with sodium sulphate.
   (2) tritiated water at 5 Ci.mL; New England Nuclear Corp.; diluted to about 1 mCi/mL.

 Estimated Errors:
   Solubility: better than 1% (type of error not specified)

 References:
   1Timmermans, J. Physico-chemical onstants of pure organic compounds, Elsevier, 1950.