IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitromethane with 1,2-Ethanediol, 2-Methoxy-2-methylpropane 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) 2-Methoxy-2-methylpropane; C5H12O; [1634-04-4]  NIST Chemistry WebBook for detail
   (4) 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. Compositions of liquid phases at equilibrium
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mass Fraction w₃	Mole Fraction x₁	Mole Fraction x₂	Mole Fraction x₃	Comment(s)
20	293	0.207	0.054	0.728	0.260	0.067	0.632	nitromethane (ether)-rich phase
20	293	0.385	0.091	0.511	0.443	0.103	0.407	nitromethane (ether)-rich phase
20	293	0.539	0.110	0.373	0.585	0.117	0.256	nitromethane (ether)-rich phase
20	293	0.188	0.037	0.762	0.236	0.046	0.662	nitromethane (ether)-rich phase
20	293	0.403	0.058	0.520	0.456	0.064	0.407	nitromethane (ether)-rich phase
20	293	0.512	0.061	0.409	0.559	0.065	0.309	nitromethane (ether)-rich phase
20	293	0.165	0.012	0.804	0.206	0.015	0.696	nitromethane (ether)-rich phase
20	293	0.370	0.020	0.584	0.420	0.022	0.459	nitromethane (ether)-rich phase
20	293	0.613	0.019	0.345	0.646	0.020	0.252	nitromethane (ether)-rich phase
20	293	0.162	0.005	0.812	0.202	0.006	0.703	nitromethane (ether)-rich phase
20	293	0.362	0.008	0.603	0.413	0.009	0.476	nitromethane (ether)-rich phase
20	293	0.605	0.009	0.357	0.631	0.009	0.258	nitromethane (ether)-rich phase
20	293	0.076	0.738	0.079	0.062	0.595	0.045	water (glycol)-rich phase
20	293	0.128	0.694	0.085	0.108	0.577	0.050	water (glycol)-rich phase
20	293	0.174	0.671	0.081	0.153	0.579	0.049	water (glycol)-rich phase
20	293	0.055	0.681	0.059	0.038	0.459	0.028	water (glycol)-rich phase
20	293	0.095	0.642	0.055	0.065	0.430	0.026	water (glycol)-rich phase
20	293	0.115	0.650	0.053	0.082	0.454	0.026	water (glycol)-rich phase
20	293	0.037	0.431	0.037	0.017	0.196	0.012	water (glycol)-rich phase
20	293	0.060	0.420	0.034	0.028	0.193	0.011	water (glycol)-rich phase
20	293	0.080	0.428	0.024	0.038	0.200	0.008	water (glycol)-rich phase
20	293	0.035	0.227	0.023	0.013	0.083	0.006	water (glycol)-rich phase
20	293	0.059	0.244	0.030	0.023	0.093	0.008	water (glycol)-rich phase
20	293	0.076	0.255	0.022	0.030	0.099	0.006	water (glycol)-rich phase

Table 2. Estimated plait points of the quaternary system
Mass Fraction w₁ (compiler)	Mass Fraction w₂ (compiler)	Mass Fraction w₃ (compiler)	Mole Fraction x₁	Mole Fraction x₂	Mole Fraction x₃
0.368	0.398	0.229	0.394	0.419	0.170
0.388	0.397	0.209	0.412	0.415	0.154
0.427	0.386	0.183	0.450	0.400	0.134

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

   Composition: Concentration: ± 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 S4 molecular sieve and its water content monitored by the Karl Fischer method during the measurement; n(20 °C, D) = 1.4297, ρ(20 °C) = 1109.5 g·L^-1.
   (3) Obtained from the Synthetic Rubber Research Institute (Czech); dried with sodium and distilled on a packed column; 0.005 mass % of water by the Karl Fischer analysis; n(20 °C, D) = 1.3688, ρ(20 °C) = 740.3 g·L^-1.
   (4) Twice distilled.

Estimated Errors:

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