IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Nitromethane with Sulfur hexafluoride
Components:
   (1) Nitromethane; CH3NO2; [75-52-5]  NIST Chemistry WebBook for detail
   (2) Sulfur hexafluoride; SF6; [2551-62-4]  NIST Chemistry WebBook for detail
Original Measurements:
   Friedman, H.L., J. Am. Chem. Soc. 74, 3294-7 (1954).

 Variables:
   Temperature = 273 K to 298 K

 Prepared By:
   V. P. Sazonov

 Experimental Data:   (Notes on the Nomenclature)
  
Solubility of sulfur hexafluoride in nitromethane
t/°CT/KOstwald coefficient, L /dimensionlessComment(s)
0.10273.250.3720.374; 0.369
19.35292.500.3630.354; 0.364; 0.369
24.85298.000.3770.374; 0.380
 Method/Apparatus/Procedure:
   The method was essentially that employed Eucken and Herzberg.1 The solvent was degassed by alternately opening to the vacuum pump for 5-15 s and then stirring very rapidly to produce cavitation. This was repeated 5-10 times. In the solubility measurement itself gas, which had been previously saturated with solvent vapor, was admitted to the saturation vessel, holding about 80 mL of solution, and with 5-10 mL remaining space, volume-time measurements were taken and extrapolated back to the time the gas was admitted. Then the stirrer was turned on and driven very fast, producing a slightly (~1%) supersaturated solution. The approach to equilibrium was then followed from each direction while stirring as rapidly as possible without producing cavitation and bubbles.

 Source and Purity of Materials:
   (1) Source not specified; purity not specified; redistilled and dried by filtering at -20 °C.
   (2) Mathieson; purified from a more volatile impurity by fractional condensation at -190 °C.

 Estimated Errors:
   Solubility: relative error of 2 to 3 determinations less than 3 %.

 References:
   1 A. Eucken and G. Herzberg, Z. Phys. Chem. (Leipzig) 195, 1 (1950).