IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Cyclohexane with Deuterium oxide (heavy water)

Components:
   (1) Cyclohexane; C6H12; [110-82-7]  NIST Chemistry WebBook for detail
   (2) Deuterium oxide (heavy water); D2O; [7789-20-0]  NIST Chemistry WebBook for detail

Original Measurements:
   Backx, P.; Goldman, S., J. Phys. Chem. 1981, 85, 2975-9.

Variables:
   Temperature = 283-313 K

Prepared By:
   A. Maczynski

Experimental Data:   (Notes on the Nomenclature)

Solubility of deuterium oxide in cyclohexane
T/K	10⁴ * g₂/100 g solution (compiler)	10⁴ * Mole Fraction x₂	x₂ Note
283	0.374	1.57	std. dev.=0.08
288	0.431	1.81	std. dev.=0.10
293	0.576	2.42	std. dev.=0.10
298	0.666	2.80	std. dev.=0.11
303	0.859	3.61	std. dev.=0.24
308	1.104	4.64	std. dev.=0.56
313	1.274	5.35	std. dev.=0.24

Method/Apparatus/Procedure:
   In a 175-mL milk-dilution bottle fitted with a Bakelite screw cap and a Teflon insert and rotated end-over-end, (1) was equilibrated with an excess of (2), sampled with Hamilton syringes and titrated in an Aquatest II automatic Karl Fischer Titrator.

Source and Purity of Materials:
   (1) certified grade; washed with water, dried with silica gel, and distilled; d²⁵ 0.77390.
   (2) obtained from the manufacturer; minimum isotopic purity of 99.7 atom % D.

Estimated Errors:

   Temperature: ± 0.01 K std. dev. Of soly calcd from 18-32 determinations reported above.