Components:

(1) Acetonitrile, C₂H₃N; [75-05-8] NIST WebBook
(2) Cholesteryl esters (C39-C41), C₃₉H₆₈O₂ and C₄₁H₇₂O₂; [class-024b] NIST WebBook

Original Measurements

Schmid, H. H. O.; Mangold, H. K.; Lundberg, W. O.; J. Am. Oil Chem. Soc. 42, 372 (1965).

Variables:

Ambient temperature: 474 and 485 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 to 0.3 mm diameters) by dipping consecutively into both liquids. The height of the liquid was 7 to 10 mm. Room temperature solids were melted on a glass slide over a micro burner. The capillary was sealed at both ends to a length of 30 to 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. Baker Chemical Co.; reagent No. 9011; n(20°C, D) = 1.3445, d(20°C, 4°C) = 0.780.
2. Not specified.

Estimated Errors:

Ambient temperature: ±0.5 K.