IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitromethane with 1-Heptanol and Water

Components:
   (1) Nitromethane; CH3NO2 ; [75-52-5]  NIST Chemistry WebBook for detail
   (2) 1-Heptanol ; C7H16O; [111-70-6]  NIST Chemistry WebBook for detail
   (3) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Sazonov, V. P.; Zh. Fiz. Khim. 42, 3094-6 (1968).

Variables:
   Temperature = 292 K to 313 K

Prepared By:
   V. P. Sazonov and N. V. Sazonov

Experimental Remarks:

   The temperatures of phase transitions were determined in ternary mixtures with a constant weight content of (3), respectively, 1.0, 2.0, 4.0, 5.0, 6.0, 20.0, 40.0 and 60.0 mass %. L₁ nitromethane-rich phase, L₂ alcohol-rich phase, L₃ water-rich phase. The phase which is being dissolved is indicated in the table.

The compositions of coexistent three liquid phases at 22 °C, 25 °C, and 29 °C are also presented in graphical form.

Experimental Data: (Notes on the Nomenclature)

Table 1. Solubility temperatures of three liquid phases
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)
23.05 (L2)	296.20	0.8160	0.1440	0.7945	0.0736
25.45 (L2)	298.60	0.7872	0.1728	0.7767	0.0896
23.05 (L2)	296.20	0.8075	0.1425	0.7678	0.0712
26.60 (L2)	299.75	0.7600	0.1900	0.7385	0.0970
28.45 (L2)	301.60	0.7125	0.2375	0.7078	0.1239
23.06 (L2)	296.21	0.7990	0.1410	0.7424	0.0688
26.60 (L2)	299.75	0.7520	0.1880	0.7135	0.0937
28.45 (L2)	301.60	0.7050	0.2350	0.6834	0.1196
29.32 (L2)	302.47	0.6580	0.2820	0.6519	0.1467
29.64 (L2)	302.79	0.6110	0.3290	0.6190	0.1751
29.70 (L2)	302.85	0.5640	0.3760	0.5846	0.2047
29.72 (L2)	302.87	0.5405	0.3995	0.5668	0.2201
29.72 (a)	302.87	0.5170	0.4230	0.5486	0.2357
21.90 (L1)	295.05	0.2000	0.6000	0.1677	0.2643
23.40 (L2)	296.55	0.6800	0.1200	0.4787	0.0444
24.85 (L1)	298.00	0.2400	0.5600	0.1981	0.2428
26.74 (L2)	299.89	0.6400	0.1600	0.4566	0.0600
27.05 (L1)	300.20	0.2800	0.5200	0.2275	0.2220
28.42 (L1)	301.57	0.3200	0.4800	0.2561	0.2018
28.51 (L2)	301.66	0.6000	0.2000	0.4340	0.0760
29.21 (L1)	302.36	0.3600	0.4400	0.2838	0.1822
29.39 (L2)	302.54	0.5600	0.2400	0.4107	0.0925
29.54 (L1)	302.69	0.4000	0.4000	0.3107	0.1632
29.66 (L2)	302.81	0.5200	0.2800	0.3867	0.1094
29.70 (L1)	302.85	0.4400	0.3600	0.3368	0.1447
29.70 (L2)	302.85	0.4800	0.3200	0.3621	0.1268
29.72 (a)	302.87	0.4600	0.3400	0.3495	0.1357
20.40 (L1)	293.55	0.1500	0.4500	0.0862	0.1357
23.30 (L1)	296.45	0.1800	0.4200	0.1025	0.1257
24.00 (L2)	297.15	0.5100	0.0900	0.2667	0.0247
26.45 (L1)	299.60	0.2100	0.3900	0.1187	0.1157
27.24 (L2)	300.39	0.4800	0.1200	0.2529	0.0332
27.61 (L1)	300.76	0.2400	0.3600	0.1345	0.1060
28.78 (L1)	301.93	0.2700	0.3300	0.1501	0.0964
28.88 (L2)	302.03	0.4500	0.1500	0.2389	0.0418
29.39 (L1)	302.54	0.3000	0.3000	0.1655	0.0869
29.51 (L2)	302.66	0.4200	0.1800	0.2247	0.0505
29.66 (L1)	302.81	0.3300	0.2700	0.1807	0.0776
29.70 (L2)	302.85	0.3900	0.2100	0.2102	0.0595
29.71 (L1)	302.86	0.3450	0.2550	0.1881	0.0730
29.71 (L2)	302.86	0.3780	0.2220	0.2044	0.0630
29.72 (a)	302.87	0.3600	0.2400	0.1955	0.0685
19.10 (L2)	292.25	0.3600	0.0400	0.1492	0.0087
21.05 (L1)	294.20	0.1400	0.2600	0.0606	0.0592
24.40 (L1)	297.55	0.1600	0.2400	0.0690	0.0544
25.31 (L2)	298.46	0.3400	0.0600	0.1414	0.0131
26.95 (L1)	300.10	0.1800	0.2200	0.0773	0.0496
28.15 (L2)	301.30	0.3200	0.0800	0.1336	0.0176
28.48 (L1)	301.63	0.2000	0.2000	0.0856	0.0449
29.33 (L1)	302.48	0.2200	0.1800	0.0937	0.0403
29.34 (L2)	302.49	0.3000	0.1000	0.1258	0.0220
29.70 (L2)	302.85	0.2800	0.1200	0.1179	0.0265
29.71 (L1)	302.86	0.2500	0.1500	0.1059	0.0334
29.71 (L2)	302.86	0.2700	0.1300	0.1139	0.0288
29.72 (a)	302.87	0.2600	0.1400	0.1099	0.0311

Table 2. Solubility temperatures of two liquid phases
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)
21.55	294.70	0.8910	0.0990	0.9121	0.0532
23.15	296.30	0.1485	0.8415	0.2378	0.7079
29.30	302.45	0.8415	0.1485	0.8827	0.0818
29.98	303.13	0.1980	0.7920	0.3056	0.6421
34.14	307.29	0.2475	0.7425	0.3686	0.5809
34.21	307.36	0.7920	0.1980	0.8517	0.1119
36.90	310.05	0.2970	0.6930	0.4274	0.5238
37.05	310.20	0.7425	0.2475	0.8192	0.1434
38.48	311.63	0.3465	0.6435	0.4823	0.4705
38.57	311.72	0.6930	0.2970	0.7849	0.1767
39.34	312.49	0.3960	0.5940	0.5338	0.4205
39.40	312.55	0.6435	0.3465	0.7488	0.2118
39.58	312.73	0.6188	0.3712	0.7300	0.2301
39.71	312.86	0.4455	0.5445	0.5821	0.3737
39.72	312.87	0.5940	0.3960	0.7106	0.2489
39.82	312.97	0.4950	0.4950	0.6275	0.3296
39.86	313.01	0.5692	0.4208	0.6907	0.2682
39.88	313.03	0.5445	0.4455	0.6701	0.2882
18.40	291.55	0.8820	0.0980	0.8810	0.0514
20.15	293.30	0.1470	0.8330	0.2254	0.6708
25.15	298.30	0.1960	0.7840	0.2901	0.6096
26.65	299.80	0.8330	0.1470	0.8518	0.0790
31.35	304.50	0.7840	0.1960	0.8212	0.1078
31.84	304.99	0.2450	0.7350	0.3506	0.5525
34.18	307.33	0.7350	0.2450	0.7891	0.1382
34.25	307.40	0.2940	0.6860	0.4072	0.4990
35.79	308.94	0.6860	0.2940	0.7554	0.1700
35.90	309.05	0.3430	0.6370	0.4601	0.4490
36.62	309.77	0.6370	0.3430	0.7198	0.2036
36.90	310.05	0.3920	0.5880	0.5100	0.4018
36.92	310.07	0.6125	0.3675	0.7014	0.2210
37.10	310.25	0.5880	0.3920	0.6824	0.2390
37.15	310.30	0.4410	0.5390	0.5569	0.3575
37.17	310.32	0.5635	0.4165	0.6629	0.2574
37.20	310.35	0.4900	0.4900	0.6011	0.3158
37.23	310.38	0.5390	0.4410	0.6429	0.2763
22.35	295.50	0.1760	0.7840	0.2433	0.5694
26.90	300.05	0.2400	0.7200	0.3184	0.5018
27.03	300.18	0.7840	0.1760	0.7747	0.0914
29.72	302.87	0.7200	0.2400	0.7335	0.1285
29.96	303.11	0.2880	0.6720	0.3709	0.4546
31.29	304.44	0.6720	0.2880	0.7009	0.1578
31.65	304.80	0.3360	0.6240	0.4204	0.4101
32.22	305.37	0.6240	0.3360	0.6667	0.1886
32.55	305.70	0.3840	0.5760	0.4671	0.3681
32.64	305.79	0.5760	0.3840	0.6307	0.2209
32.73	305.88	0.5520	0.4080	0.6121	0.2376
32.81	305.96	0.5280	0.4320	0.5930	0.2548
32.95	306.10	0.4320	0.5280	0.5113	0.3283
33.00	306.15	0.5040	0.4560	0.5734	0.2725
33.07	306.22	0.4800	0.4800	0.5532	0.2906
20.58	293.73	0.1900	0.7600	0.2505	0.5262
25.15	298.30	0.2375	0.7125	0.3041	0.4791
28.02	301.17	0.2850	0.6650	0.3546	0.4346
29.59	302.74	0.6650	0.2850	0.6758	0.1521
29.74	302.89	0.3325	0.6175	0.4024	0.3926
30.43	303.58	0.6175	0.3325	0.6422	0.1816
30.79	303.94	0.3800	0.5700	0.4477	0.3527
30.84	303.99	0.5700	0.3800	0.6070	0.2126
31.00	304.15	0.5462	0.4038	0.5888	0.2286
31.11	304.26	0.5225	0.4275	0.5702	0.2450
31.24	304.39	0.4988	0.4512	0.5510	0.2619
31.28	304.43	0.4275	0.5225	0.4906	0.3150
31.32	304.47	0.4750	0.4750	0.5313	0.2793
19.20	292.35	0.1880	0.7520	0.2391	0.5024
23.63	296.78	0.2350	0.7050	0.2906	0.4580
26.52	299.67	0.2820	0.6580	0.3394	0.4160
28.48	301.63	0.3290	0.6110	0.3856	0.3762
29.49	302.64	0.3760	0.5640	0.4295	0.3384
29.87	303.02	0.4935	0.4465	0.5299	0.2518
29.90	303.05	0.4230	0.5170	0.4711	0.3025
29.93	303.08	0.4700	0.4700	0.5108	0.2683

Table 3. Compositions of three coexistent liquid phases system nitromethane + 1-heptanol + water*
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)	Comment(s)
22	295	0.824	0.130	0.786	0.065	nitromethane-rich phase
25	298	0.794	0.166	0.781	0.086	nitromethane-rich phase
29	302	0.688	0.264	0.696	0.140	nitromethane-rich phase
22	295	0.224	0.713	0.276	0.461	alcohol-rich phase
25	298	0.268	0.674	0.327	0.433	alcohol-rich phase
29	302	0.383	0.557	0.436	0.333	alcohol-rich phase
22	295	0.108	0.001	0.035	0.002	water-rich phase
25	298	0.108	0.001	0.035	0.002	water-rich phase
29	302	0.109	0.001	0.035	0.002	water-rich phase

Notes:
   Table 1  ^a    Critical opalescence.
   Table 3  ^*   These data were extracted graphically by the compilers.

Method/Apparatus/Procedure:
   The synthetic method (Alekseev¹) was used. Ampoules with given amount of (1), (2) and (3) were heated with vigorous stirring to a temperature somewhat higher than the phase transition temperature and then were slowly cooled till turbidity appeared. Then the turbidity disappearance temperature was determined when heated at a slow rate.

Source and Purity of Materials:
   (1) Source not specified; pure grade reagent; dried and repeatedly distilled in a packed glass column; n(20 °C, D) = 1.3819, d(20 °C, 4 °C) = 1.1380.
   (2) Source not specified; pure grade reagent; dried and repeatedly distilled at vacuum; n(20 °C, D) = 1.4248, d(20 °C, 4 °C) = 0.8219.
   (3) Twice distilled.

Estimated Errors:

   Temperature: ± 0.01 K.

References:
   ¹V. F. Alekseev, Zh. Russ. Fiz.-Khim. Ova 8, 249 (1876).