IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Nitromethane with Saturated fatty acids
Components:
   (1) Nitromethane; CH3NO2; [75-52-5]  NIST Chemistry WebBook for detail
   (2) Saturated fatty acids; C8H16O2-C22H44O2; []  NIST Chemistry WebBook for detail
Original Measurements:
   H.H.O. Schmid; Mangold, H.K.; Lundberg, W.O., Microchem. J. 7, 287-96 (1963).

 Variables:
   Temperature = 306 K to 401 K

 Prepared By:
   V. P. Sazonov

 Experimental Data:   (Notes on the Nomenclature)
  
Upper critical solution temperatures of the system nitromethane + saturated fatty acid
t/°CT/KChemical Name
32.5305.7Octanoic acid; C8H16O2; [124-07-2] Octanoic acid; C8H16O2; [124-07-2]
58.5331.7Decanoic acid; C10H20O2; [344-48-5]
68.0341.2Undecanoic acid; C11H22O2; [112-37-8]
76.5349.7Dodecanoic acid; C12H24O2; [143-07-7]
84.0357.2Tridecanoic acid; C13H26O2; [638-53-9]
91.5364.7Tetradecanoic acid; C14H28O2; [544-63-8]
98.0371.2Pentadecanoic acid; C15H30O2; [1002-84-2]
104.0377.2Hexadecanoic acid; C16H32O2; [57-10-3]
109.0382.2Heptadecanoic acid; C17H34O2; [506-12-7]
113.5386.7Octadecanoic acid; C18H36O2; [57-11-4]
121.0394.2Eicosanoic acid; C20H40O2; [506-30-9]
128.0401.2Docosanoic acid; C22H44O2; [112-85-6]
 Method/Apparatus/Procedure:
   The synthetic method was used. A Reichert microscope, type RCH, with a heating stage was used. A 26 x 38 mm slide was adapted to hold capillaries on the stage. Two glass strips were glued, using water glass, to the slide, leaving a 0.5 mm channel. The slide was then placed in the adjustable device of the heating stage. (1) and (2) were put into capillary tubing (0.2-0.3 mm diameter) by dipping consecutively into both liquids. The height of the liquid was 7-10 mm. Room temperature solids were melted on a glass slide over a microburner. The capillary was sealed at both ends to a length of 30-35 mm, then inserted in to the channel on the slide and heated on the stage. The UCST was determined by following the appearance and disappearance of the meniscus.

 Source and Purity of Materials:
   (1) Fisher Scientific Co.; certified, No. N-98; n(20 °C, D) = 1.3820, d(20 °C) = 1134 g·L-1.
   (2) Undecanoic, tridecanoic, pentadecanoic and heptadecanoic acids obtained from Lachat Chemical Co.; other acids from the Hormel Foundation; purified by gas-liquid partition and thin-layer adsorption chromatography.

 Estimated Errors:

   Temperature: ± 0.5 K.