IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitromethane with Toluene and Methylcyclohexane

Components:
   (1) Nitromethane; CH3NO2 ; [75-52-5]  NIST Chemistry WebBook for detail
   (2) Methylcyclohexane; C7H14; [108-87-2]  NIST Chemistry WebBook for detail
   (3) Toluene; C7H8; [108-88-3]  NIST Chemistry WebBook for detail

Original Measurements:
   Kotarski, A.; Przem. Chem. 42, 413 (1963).

Variables:
   Temperature = 293 K

Prepared By:
   V. P. Sazonov

Experimental Data:   (Notes on the Nomenclature)

Table 1. Mutual solubility of nitromethane, toluene and methylcyclohexane
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)
20.0	293.2	0.018	0.000	0.029	0.000
20.0	293.2	0.035	0.084	0.055	0.087
20.0	293.2	0.045	0.120	0.070	0.123
20.0	293.2	0.061	0.193	0.093	0.196
20.0	293.2	0.072	0.234	0.109	0.236
20.0	293.2	0.089	0.258	0.134	0.257
20.0	293.2	0.100	0.277	0.149	0.274
20.0	293.2	0.139	0.324	0.202	0.312
20.0	293.2	0.199	0.356	0.280	0.331
20.0	293.2	0.331	0.357	0.435	0.311
20.0	293.2	0.456	0.322	0.565	0.264
20.0	293.2	0.535	0.290	0.640	0.230
20.0	293.2	0.603	0.259	0.701	0.199
20.0	293.2	0.670	0.215	0.758	0.161
20.0	293.2	0.729	0.182	0.806	0.133
20.0	293.2	0.782	0.143	0.847	0.103
20.0	293.2	0.860	0.081	0.905	0.056
20.0	293.2	0.958	0.000	0.973	0.000

Table 2. Compositions of two liquid phases at equilibrium for the ternary system
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)	Comment(s)
20.0	293.2	0.933	0.023	0.956	0.016	nitromethane-rich phase
20.0	293.2	0.911	0.042	0.941	0.029	nitromethane-rich phase
20.0	293.2	0.885	0.063	0.923	0.043	nitromethane-rich phase
20.0	293.2	0.883	0.066	0.921	0.046	nitromethane-rich phase
20.0	293.2	0.813	0.119	0.870	0.085	nitromethane-rich phase
20.0	293.2	0.805	0.125	0.864	0.089	nitromethane-rich phase
20.0	293.2	0.769	0.151	0.837	0.109	nitromethane-rich phase
20.0	293.2	0.769	0.150	0.837	0.108	nitromethane-rich phase
20.0	293.2	0.686	0.210	0.771	0.156	nitromethane-rich phase
20.0	293.2	0.583	0.268	0.683	0.208	nitromethane-rich phase
20.0	293.2	0.564	0.277	0.666	0.217	nitromethane-rich phase
20.0	293.2	0.023	0.027	0.037	0.028	hydrocarbon-rich phase
20.0	293.2	0.030	0.061	0.047	0.064	hydrocarbon-rich phase
20.0	293.2	0.040	0.114	0.062	0.117	hydrocarbon-rich phase
20.0	293.2	0.044	0.123	0.068	0.127	hydrocarbon-rich phase
20.0	293.2	0.071	0.225	0.108	0.227	hydrocarbon-rich phase
20.0	293.2	0.077	0.233	0.117	0.234	hydrocarbon-rich phase
20.0	293.2	0.098	0.272	0.146	0.269	hydrocarbon-rich phase
20.0	293.2	0.108	0.279	0.160	0.274	hydrocarbon-rich phase
20.0	293.2	0.160	0.318	0.230	0.303	hydrocarbon-rich phase
20.0	293.2	0.227	0.356	0.314	0.327	hydrocarbon-rich phase
20.0	293.2	0.240	0.355	0.330	0.324	hydrocarbon-rich phase

Method/Apparatus/Procedure:
   The solubility curve was determined by the method of Rifai and Durandet.¹ The analytical method was used to determine coexisting liquid phase compositions. A known weight of a two-phase mixture was equilibrated in a thermostat, separated, liquid phases weighed, and the refractive index of coexisting phases measured. Concentrations of (1) and (3) in both phases were measured using calibrated plots, which allowed determination of coexisting phase compositions.

Source and Purity of Materials:
   (1) Source not specified; dried over molecular sieve and distilled; n(20 °C, D) = 1.3820.
   (2) Source not specified; dried over molecular sieve and distilled; n(20 °C, D) = 1.4968.
   (3) Source not specified; purified on silica gel and fractionally distilled; n(20 °C, D) = 1.4233,d(20 °C, 4 °C) = 0.7695 .

Estimated Errors:
   Solubility: titer: ± 0.005 mL.

References:
   ¹T. Rifai and J. Durandet, Rev. Inst. Franc. Petrole 17, 1232 (1962).