Solubility System: Nitroethane with cis-9-Octadecenoic acid (Original Report)
(2) cis-9-Octadecenoic acid, C18H34O2; [112-80-1] NIST Chemistry WebBook
|T (°C)||T (K)||s2||w2||x2|
|-10.0||263.2||2.2a x 102||2.1 x 102||0.006|
|0||273.2||3.4a x 102||3.3 x 102||0.009|
|10.0||283.2||8.7b x 102||8.0 x 102||0.023|
|20.0||293.2||14.3b x 102||12.5 x 102||0.037|
a) Solid-liquid equilibrium
b) Liquid-liquid equilibrium.
The synthetic method was used. The solubilities of acid were determined by weighing 2 - 5 g portions of the acid into 2 cm×15 cm Pyrex test-tubes which were fitted with a Nichrome stirrer and a thermocouple well, the test-tube being inserted into a larger tube which served as an air-bath. Upon successive additions of weighed amounts of solvent, the solubilities were determined by measuring the temperatures at which crystals precipitated and dissolved upon alternately cooling and heating the systems in an acetone-dry ice-bath or water-bath as required.
(1) Source not specified; best grade reagent; dried and distilled.
(2) Prepared from high quality oil by saponification; purified by recrystallization and by vacuum distillation in packed column; m. p. = 16.30°C, n(20°C,D) = 1.4599.
Temperature: ±0.1 K.