SDS Volume (1695)

Volume 58. Polycyclic Aromatic Hydrocarbons: Binary Non-aqueous Systems, Part I Solutes A-E, p 265

Original Measurements

Fung, H. L.; Higuchi, T.; J. Pharm. Sci. 1987, 60, 1782-1788.

Variables:

Room Temp: 298 $\pu{K}$

Prepared by:

W.E. Acree, Jr.

Method/Apparatus/Procedure:

Constant temperature bath, calorimetric thermometer, and an ultraviolet/visible spectrophotometer. Excess solute and solvent placed in amber glass bottles and allowed to equilibrate for 24 hours at constant temperature. Attainment of equilibrium verified by repetitive measurements. Aliquots of saturated solutions transferred through a course filter into tared volumetric flasks, weighed and diluted with ether. Concentrations determined spectrophotometrically at 292.5 nm.

Source and Purity of Materials:
  1. Reagent Grade, source not specified recrystallized from aqueous-ethanol to give a melting point of 242-243°C.
  2. Reagent Grade, source not specified was washed with distilled water five times, stored overnight over calcium chloride and distilled from phosphorous pentoxide.
Estimated Errors:

Ambient temperature: T/K: ±0.1 (compiler).
Mole fraction - Liquid (1): x1: ±3% (relative error, compiler).

Components:
  1. Carbazole, $\ce{ C12H9N }$; [86-74-8] NIST WebBook
  2. Trichloromethane, $\ce{ CHCl3 }$; [67-66-3] NIST WebBook
Experimental Data
$T$ (°C) $x_{1}$ $x_{2}$
25.0 3.7 x 10-30.9963

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