IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitromethane with 1,2-Ethanediol and Water

Components:
   (1) Nitromethane; CH3NO2 ; [75-52-5]  NIST Chemistry WebBook for detail
   (2) 1,2-Ethanediol; C2H6O2 ; [107-21-1]  NIST Chemistry WebBook for detail
   (3) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Kubicek, V.; Novak, J. P. and Matous, J.; Collect. Czech. Chem. Commun. 58, 983-95 (1993).

Variables:
   Temperature = 293 K

Prepared By:
   V. P. Sazonov

Experimental Data:   (Notes on the Nomenclature)

Table 1. Mutual solubility of nitromethane, 1,2-ethanediol and water
t/°C	T/K	Mass Fraction w₁ (compiler)	Mass Fraction w₂ (compiler)	Mole Fraction x₁	Mole Fraction x₂
20.0	293	0.097	0.300	0.040	0.121
20.0	293	0.099	0.454	0.048	0.217
20.0	293	0.121	0.609	0.074	0.367
20.0	293	0.197	0.728	0.169	0.614
20.0	293	0.959	0.036	0.947	0.035

Table 2. Compositions of equilibrium liquid phases ternary system
t/°C	T/K	Mass Fraction w₁ (compiler)	Mass Fraction w₂ (compiler)	Mole Fraction x₁	Mole Fraction x₂	Comment(s)
20	293	0.965	0.026	0.946	0.025	nitromethane-rich phase
20.0	293	0.972	0.014	0.941	0.013	nitromethane-rich phase
20.0	293	0.976	0.006	0.936	0.006	nitromethane-rich phase
20.0	293	0.977	0.002	0.932	0.002	nitromethane-rich phase
20.0	293	0.155	0.692	0.115	0.503	glycol (water)-rich phase
20.0	293	0.103	0.554	0.057	0.301	glycol (water)-rich phase
20.0	293	0.093	0.374	0.041	0.162	glycol (water)-rich phase
20.0	293	0.095	0.190	0.035	0.069	glycol (water)-rich phase

Method/Apparatus/Procedure:
   Two methods were used. The solubility curve was determined by the titration method. The compositions of equilibrium liquid phases were determined by the analytical method with the apparatus described in Kubicek et al.¹

   Composition: ± 0.001 mole fraction. Source and Purity of Materials:
   (1) Xenon (Poland); dried with sodium and distilled on a packed column with 40 theoretical plates; n(20 °C, D) = 1.3820, ρ(20 °C) = 1138.2 g · L^-1.
   (2) Lachema (Czech); not purified; stored over Dusimo S molecular sieve and its water content monitored by the Karl Fischer method during the measurement; n(20 °C, D) = 1.4297, p(20 °C) = 1109.5 g · L^–1.
   (3) Twice distilled.

Estimated Errors:

References:
   ¹V. Kubicek, J. Matous, and J. P. Novak, Collect. Czech. Chem. Commun. 57, 2021 (1992).