IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Eicosane with Water
Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) Eicosane; C20H42; [112-95-8]  NIST Chemistry WebBook for detail
Original Measurements:
   Sutton, C.; Calder, J.A., Environ. Sci. Technol. 1974, 8, 654-7.

 Variables:
   Temperature = 25 °C

 Prepared By:
   M.C. Haulait-Pirson

 Experimental Remarks:
   The solubility of eicosane in water at 25°C was reported to be 1.9 × 10–7 g(1)/100 g(2) corresponding to a mole fraction x1, of 1.1 × 10–10.

 Experimental Data:   (Notes on the Nomenclature)
   Method/Apparatus/Procedure:
   175 mg (1) were equilibrated with 700 mL (2) in closed flasks by shaking on a constant temperature bath for 12 hours. The flasks were then allowed to stand for 24 hours. Aliquots of 100 mL were removed, filtered through a 0.45 µm Millipore filter, then extracted three times with 10-mL portions of hexane containing an internal standard. The concentration of (1) was determined by injection of the hexane extract into a dual column gas chromatograph equipped with flame ionization detectors.

 Source and Purity of Materials:
   (1) Analabs Inc., 99+%.
   (2) Doubly distilled.

 Estimated Errors:
   Solubility: ± 16%
   Temperature: ± 0.1 °C