SDS Volume (4295)

Volume 71. Nitromethane with Water or Organic Solvents, p None

Original Measurements

Schmid, H. H. O.; Mangold, H. K.; Lundberg, W. O.; Microchem. J. 7, 287-96 (1963).

Variables:

Room Temp: 306 - 401 $\pu{K}$

Prepared by:

V.P. Sazonov

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; $n_{D}^{20}$ = 1.3820, $\rho^{20} = \pu{1134 g L-1}$.
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:

Ambient temperature: ±0.5 K.