IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Pyrene with Water
Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) Pyrene; C16H10; [129-00-0]  NIST Chemistry WebBook for detail
Original Measurements:
   Wauchope, R.D.; Getzen, F.W., J. Chem. Eng. Data 1972, 17(1), 38-41.

 Variables:
   Temperature = 0 °C - 75 °C

 Prepared By:
   A. Maczynski

 Experimental Data:   (Notes on the Nomenclature)
  
Solubility of pyrene in water
t/°Cg1/kgg1/kg Note105 * g1/100 g solution (compiler)108 * Mole Fraction x1 (compiler)
0.0-std dev = 0.049 (0.001)0.490.44
22.20.129, 0.128, 0.124std dev = 0.1301.301.15
25.0-std dev = 0.148 (0.002)1.481.32
34.50.228, 0.235std dev = 0.2352.352.09
44.70.397, 0.395, 0.405std dev = 0.3993.993.55
50.0-std dev = 0.532 (0.004)5.324.74
50.10.558, 0.576, 0.556std dev = 0.5345.344.75
55.60.75, 0.75, 0.77std dev = 0.737.36.5
56.00.74std dev = 0.747.46.6
60.70.96, 0.95, 0.90std dev = 0.979.78.6
65.21.27, 1.29std dev = 1.2712.711.3
71.91.83, 1.86, 1.89std dev = 1.9019.016.9
74.72.21std dev = 2.2622.620.1
75.0-std dev = 2.31 (0.03)23.120.6
 Method/Apparatus/Procedure:
   Approximately 20 g of (1) was placed in each of three 250-mL glass-stoppered flasks with (2). The flasks were suspended in an open water bath and shaken gently from one to three weeks between measurements. Samples of the replicate were extracted with cyclohexane. In all cases, spectra taken of second extracts or of the aqueous layer after extraction indicated complete extraction. Standard solutions were prepared either by direct weighing using a Cahn electrobalance, or by weighing 0.1-0.2 g of samples followed by serial dilution in calibrated glassware.

 Source and Purity of Materials:
   (1) Baker reagent; recrystallized three times from ether; vacuum-sublimed twice; purity not specified.
   (2) Distilled and deionized.

 Estimated Errors:
   Solubility: See experimental values above.
   Temperature: ± 0.5 °C