IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: 1-Nitropropane with Methanol and Water

Components:
   (1) 1-Nitropropane; C3H7NO2; [108-03-2]  NIST Chemistry WebBook for detail
   (2) Methanol; CH4O; [67-56-1]  NIST Chemistry WebBook for detail
   (3) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Hankinson, R.W.; Thompson, D., J. Chem. Eng. Data 10, 18-9 (1965).

Variables:
   Temperature = 298 K and 303 K

Prepared By:
   V. P. Sazonov and M. F. Chernysheva

Experimental Data:   (Notes on the Nomenclature)

Table 1. Mutual solubility of 1-nitropropane (1), methanol (2) and water (3)
t/°C	T/K	10² * Mass Fraction w₁	10² * Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)
25.00	298.15	2.1	13.3	0.005	0.081
25.00	298.15	2.7	23.3	0.006	0.150
25.00	298.15	3.1	31.1	0.007	0.209
25.00	298.15	5.2	36.7	0.013	0.259
25.00	298.15	7.3	40.9	0.019	0.302
25.00	298.15	9.2	44.1	0.025	0.339
25.00	298.15	12.0	46.1	0.035	0.370
25.00	298.15	13.8	48.1	0.041	0.399
25.00	298.15	28.8	45.7	0.102	0.452
25.00	298.15	34.2	43.5	0.129	0.457
25.00	298.15	41.8	39.9	0.173	0.458
25.00	298.15	52.9	33.6	0.249	0.439
25.00	298.15	61.6	27.9	0.323	0.407
25.00	298.15	71.7	22.7	0.443	0.390
25.00	298.15	83.4	13.2	0.611	0.269
30.00	303.15	2.4	13.3	0.005	0.081
30.00	303.15	3.2	23.2	0.007	0.150
30.00	303.15	4.1	27.2	0.010	0.181
30.00	303.15	4.5	30.7	0.011	0.208
30.00	303.15	6.4	36.3	0.016	0.259
30.00	303.15	8.6	40.3	0.023	0.301
30.00	303.15	10.8	43.4	0.030	0.338
30.00	303.15	13.8	45.4	0.040	0.369
30.00	303.15	16.0	45.6	0.048	0.382
30.00	303.15	19.1	46.4	0.060	0.405
30.00	303.15	22.8	46.3	0.075	0.424
30.00	303.15	27.3	45.3	0.095	0.438
30.00	303.15	21.7	51.8	0.073	0.486
30.00	303.15	28.3	45.1	0.100	0.441
30.00	303.15	41.0	39.2	0.166	0.441
30.00	303.15	52.3	33.3	0.243	0.430
30.00	303.15	61.3	27.9	0.320	0.404
30.00	303.15	70.0	22.3	0.414	0.367
30.00	303.15	82.9	13.2	0.599	0.265

Table 2. Composition of two liquid phases at equilibrium
t/°C	T/K	10² * Mass Fraction w₁	10² * Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)	Comment(s)
25.00	298.15	93.9	4.7	0.824	0.115	1-nitropropane-rich phase
25.00	298.15	86.9	10.2	0.671	0.219	1-nitropropane-rich phase
25.00	298.15	75.2	19.5	0.484	0.348	1-nitropropane-rich phase
25.00	298.15	65.2	26.1	0.361	0.401	1-nitropropane-rich phase
25.00	298.15	54.2	32.9	0.259	0.437	1-nitropropane-rich phase
25.00	298.15	48.1	35.9	0.211	0.439	1-nitropropane-rich phase

Table 3. Composition of two liquid phases at equilibrium
t/°C	T/K	10² * Mass Fraction w₁	10² * Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)	Comment(s)
25.00	298.15	3.0	19.9	0.007	0.126	water-rich phase
25.00	298.15	3.2	22.9	0.007	0.147	water-rich phase
25.00	298.15	3.6	28.4	0.008	0.189	water-rich phase
25.00	298.15	4.5	32.3	0.011	0.221	water-rich phase
25.00	298.15	6.1	37.9	0.016	0.271	water-rich phase
25.00	298.15	8.4	42.3	0.023	0.318	water-rich phase

Method/Apparatus/Procedure:
   Two methods were used. The solubility data were determined by a modification of the "cloud point" method described in Other et al.¹ 20-mL mixtures of (2) and (3) were placed in flasks, sealed and immersed in a constant temperature bath for approximately four hours. Each container in turn was opened, and the contents titrated from calibrated burettes with of (1). The (1)-rich portion of the solubility curve was obtained by reversing the procedure. The vessel containing the titrated mixture was continually agitated in a constant temperature bath. The equilibrium data were determined by the synthetic method described in Other et al.¹ Solutions consisting of all three components were made. These two-phase mixtures were then sealed in polyethylene containers and placed in the constant temperature bath. Each container was removed from the constant temperature bath, then the two phases were separated, and the refractive index of each phase was determined.

Source and Purity of Materials:
   (1) Commercial Solvents Corp.; 99 mass % purity.
   (2) Source not specified; purity not specified; distilled with a boiling range of ±0.1 K.
   (3) Twice distilled.

Estimated Errors:

   Temperature: control: ±0.01 K

References:
   ¹ D. F. Other, R. E. White, and E. Trueger, Ind. Eng. Chem. 33, 1240 (1941).