IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Cyclohexane with Water
Components:
   (1) Cyclohexane; C6H12; [110-82-7]  NIST Chemistry WebBook for detail
   (2) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
Original Measurements:
   Kirchnerova, J.; Cave, G.C.B., Can. J. Chem. 1976, 54(24), 3909-16.

 Variables:
   Temperature = One temperature: 25 °C

 Prepared By:
   M.C. Haulait-Pirson

 Experimental Remarks:
   The solubility of water in cyclohexane at 25 °C was reported to be 0.0030 mol (2)/dm3 sln.
With the assumption of a solution density of 0.7739 g cm-3 (density value of pure cyclohexane reported in ref 1, the corresponding mass percent is 0.0070 g(2)/100 g sln and the corresponding mole fraction, x2, is 3.3 x 10-4 (compiler).

 Experimental Data:   (Notes on the Nomenclature)
   Method/Apparatus/Procedure:
   The Karl Fischer dead-stop back-titration method was used. 50 mL of (1) was placed in the equilibration vessel. A test tube containing 6 mL of (2) was then placed in the vessel so that the rim of the tube rested against the upper inside wall of the vessel. The vessel was then stoppered, placed inside a plastic bag and submerged in a water thermostat. Trials had shown that the concentration of (2) in (1) became constant within 2 days. 10 ml of (1) saturated with (2) were transferred to the titration vessel for water determination. Apparatus is described in the paper.

 Source and Purity of Materials:
   (1) Fisher C-555; purified by double crystallization; purity 99.6% (gas chromatographic analysis);d425 0.7734 ± 0.00001
   (2) distilled and de-ionized

 Estimated Errors:
   Solubility: ± 0.0002 mol(2)/dm3 sln (std. dev. from 5 determinations)
   Temperature: ± 0.1 K

 References:
   1Goldman, S. Can. J. Chem. 1974, 52, 1668.