IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Acetonitrile with Sulfur dioxide
Components:
   (1) Acetonitrile; C2H3N; [75-05-8]  NIST Chemistry WebBook for detail
   (2) Sulfur dioxide; SO2; [7446-09-5]  NIST Chemistry WebBook for detail
Original Measurements:
   Byerley, J.J.; Rempel, G.L.; Le, V. Thang, J. Chem. Eng. Data 25, 55-6 (1980).

 Variables:
   Temperature = 298 K and 323 K

 Prepared By:
   Valerii P. Sazonov

 Experimental Data:   (Notes on the Nomenclature)
  
Solubility of sulfur dioxide (2) in acetonitrile (1) at 101.3 kPa total pressure
t/°CT/Kg2/100 g solution102 * Mass Fraction w2 (compiler)Mole Fraction x2 (compiler)
25.0298.284.645.80.351
50.0323.225.6420.410.1411
 Method/Apparatus/Procedure:
   The analytical method was used. The solubility of sulfur dioxide was studied in a 50 mL buret equipped with a water jacket. Sulfur dioxide was bubbled at a slow flow rate approximately 60 mL/min with the gas flow being from bottom to top of the buret. The gas exited through a spiral condenser in order to avoid excessive loss of acetonitrile. The sulfur dioxide concentration after saturation was measured by titrating excess iodine with standard thiosulfate solution using starch as the indicator.

 Source and Purity of Materials:
   (1) J. T. Baker; reagent grade; not purified.
   (2) Union Carbide Canada, Ltd.; reagent grade; not purified.

 Estimated Errors:

   Temperature: ± 0.1 K.