IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Benzo[e]pyrene with Water

Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) Benzo[e]pyrene; C20H12; [192-97-2]  NIST Chemistry WebBook for detail

Original Measurements:
   Schwarz, F.P., J. Chem. Eng. Data. 1977, 22, 273-7.

Variables:
   Temperature = 8.6 °C - 31.7 °C

Prepared By:
   A. Maczynski

Experimental Data:   (Notes on the Nomenclature)

Solubility of benzo[e]pyrene in water
t/°C	10⁷ * g₁/100 g solution (compiler)	10¹⁰ * Mole Fraction x₁ (compiler)	10⁸ * n₁/V₂ [mol/L]
8.6	3.25	2.32	1.29 ± 0.07
14.0	3.58	2.56	1.42 ± 0.05
17.0	4.44	3.17	1.76 ± 0.13
17.5	3.94	2.81	1.56 ± 0.08
20.0	4.59	3.28	1.82 ± 0.09
20.2	4.79	3.42	1.90 ± 0.14
23.0	5.07	3.62	2.01 ± 0.20
23.2	5.35	3.82	2.12 ± 0.10
29.2	6.43	4.59	2.55 ± 0.02
31.7	6.81	4.86	2.70 ± 0.15

Method/Apparatus/Procedure:
Two methods were used.

At 25 °C the solubility of (1) in (2) was determined from UV absorption measurements and was used as a standard at other temperatures. At other temperatures the spectrofluorimetry method was used.

The sealed fluorescence cells contained 5 mL of the aqueous solution and an excess of (1) were rotated at least 72 h in a water bath, then removed, quickly wiped dry and placed in the fluorimeter.

Source and Purity of Materials:
   (1) Source not specified; better than 99 mole%, by glc; used as received.
   (2) Distilled over KMnO₄ and NaOH and passed through a Sephadex column.

Estimated Errors:
   Solubility: See above.
   Temperature: ± 0.1 °C