IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: Nitromethane with Naphthalene and Water

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Components:
   (1) Nitromethane; CH3NO2 ; [75-52-5]  NIST Chemistry WebBook for detail
   (2) Naphthalene; C10H8; [91-20-3]  NIST Chemistry WebBook for detail
   (3) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Sazonov, V. P. and Chernysheva, M. F.; Zh. Obshch. Khim. 47, 534 (1977); *Chernysheva, M. F.; Dissertation, Novosibirsk Institute of Inorganic Chemistry, 1982.

Variables:
   Temperature = 287 K to 449 K

Prepared By:
   V. P. Sazonov

Experimental Remarks:

   The temperatures of phase transitions were determined in ternary mixtures with a constant mass relationship of (1) and (3), respectively, 20.0:80.0, 40.0:60.0, 90.0:10.0; with a constant mass relationship of (1) and (2), respectively, 70.0:30.0, 75.0:25.0; and also with a constant mass relationship of (2) and (3), respectively, 10.0:90.0 and 15.0:85.0. L₁ nitromethane-rich phase; L₃ water-rich phase; S naphthalene. The phase which is being dissolved is indicated in the tables.

Experimental Data:   (Notes on the Nomenclature)
  

Table 1. Solubility temperatures of three phases

t/°C	T/K	Mass Fraction w1	Mass Fraction w2	Mole Fraction x1 (compiler)	Mole Fraction x2 (compiler)
42.40 (S)	315.55	0.1896	0.0520	0.0681	0.0089
49.60 (S)	322.75	0.1800	0.1000	0.0675	0.0179
53.75 (S)	326.90	0.1696	0.1520	0.0668	0.0285
56.15 (S)	329.30	0.1603	0.1986	0.0661	0.0390
59.10 (S)	332.25	0.1502	0.2490	0.0652	0.0515
61.15 (S)	334.30	0.1401	0.2997	0.0643	0.0655
64.60 (S)	337.75	0.1200	0.4000	0.0620	0.0984
66.15 (S)	339.30	0.1100	0.4500	0.0606	0.1181
67.40 (S)	340.55	0.1013	0.4934	0.0593	0.1375
70.20 (S)	343.35	0.0781	0.6095	0.0547	0.2035
72.60 (S)	345.75	0.0606	0.6972	0.0499	0.2737
74.60 (S)	347.75	0.0427	0.7865	0.0429	0.3761
76.75 (S)	349.90	0.0208	0.8960	0.0285	0.5851
14.00 (S)	287.15	0.5688	0.0520	0.3029	0.0132
28.35 (S)	301.50	0.5388	0.1020	0.2986	0.0269
36.00 (S)	309.15	0.5066	0.1556	0.2937	0.0429
40.75 (S)	313.90	0.4796	0.2006	0.2892	0.0576
43.45 (S)	316.60	0.4498	0.2503	0.2838	0.0752
45.95 (S)	319.10	0.4208	0.2986	0.2780	0.0940
50.50 (S)	323.65	0.3600	0.4000	0.2640	0.1397
52.50 (S)	325.65	0.3312	0.4480	0.2563	0.1651
54.80 (S)	327.95	0.2982	0.5030	0.2462	0.1978
58.10 (S)	331.25	0.2448	0.5920	0.2268	0.2612
63.85 (S)	337.00	0.1776	0.7040	0.1944	0.3668
67.80 (S)	340.95	0.1190	0.8016	0.1546	0.4960
72.85 (S)	346.00	0.0610	0.8984	0.0974	0.6831
19.65 (S)	292.80	0.8073	0.1030	0.6958	0.0423
27.90 (S)	301.05	0.7648	0.1502	0.6803	0.0636
33.90 (S)	307.05	0.7210	0.1989	0.6633	0.0871
37.45 (S)	310.60	0.6763	0.2486	0.6446	0.1129
40.80 (S)	313.95	0.6304	0.2996	0.6241	0.1412
45.45 (S)	318.60	0.5400	0.4000	0.5783	0.2040
47.90 (S)	321.05	0.4941	0.4510	0.5522	0.2400
50.15 (S)	323.30	0.4428	0.5080	0.5201	0.2842
51.80 (S)	324.95	0.4074	0.5473	0.4959	0.3173
53.95 (S)	327.10	0.3613	0.5986	0.4619	0.3645
59.80 (S)	332.95	0.2994	0.6673	0.4101	0.4353
63.80 (S)	336.95	0.1800	0.8000	0.2863	0.6060
69.5 (S)	342.7	0.1020	0.8867	0.1813	0.7506
39.40 (S)	312.55	0.6887	0.2952	0.7792	0.1591
39.40 (S)	312.55	0.6867	0.2943	0.7705	0.1573
39.40 (S)	312.55	0.6789	0.2910	0.7384	0.1507
39.40 (S)	312.55	0.6717	0.2879	0.7103	0.1450
39.50 (S)	312.65	0.6635	0.2843	0.6800	0.1388
39.50 (S)	312.65	0.6311	0.2705	0.5771	0.1178
35.95 (S)	309.10	0.7378	0.2459	0.8107	0.1287
36.05 (S)	309.20	0.7312	0.2438	0.7846	0.1246
36.10 (S)	309.25	0.7132	0.2377	0.7184	0.1140
36.10 (S)	309.25	0.7345	0.2448	0.7974	0.1265
36.10 (S)	309.25	0.7262	0.2421	0.7653	0.1215
36.30 (S)	309.45	0.7031	0.2344	0.6851	0.1086
52.55 (S)	325.70	0.1495	0.0850	0.0537	0.0145
56.20 (S)	329.35	0.1295	0.0870	0.0458	0.0147
59.60 (S)	332.75	0.1160	0.0884	0.0422	0.0153
61.35 (S)	334.50	0.1025	0.0898	0.0356	0.0148
63.05 (S)	336.20	0.0946	0.0905	0.0326	0.0149
63.15 (S)	336.25	0.0934	0.0907	0.0322	0.0149
68.30 (S)	341.45	0.0678	0.0932	0.0230	0.0150
69.70 (S)	342.85	0.0590	0.0941	0.0198	0.0151
75.25 (S)	348.40	0.0295	0.0970	0.0097	0.0152
54.90 (S)	328.05	0.1503	0.1275	0.0565	0.0228
60.10 (S)	333.25	0.1179	0.1323	0.0433	0.0232
63.95 (S)	337.10	0.0976	0.1354	0.0354	0.0234
63.95 (S)	337.10	0.0942	0.1359	0.0340	0.0234
65.60 (S)	338.75	0.0853	0.1372	0.0306	0.0235
73.25 (S)	346.40	0.0515	0.1423	0.0181	0.0238
17.63 (L3)	290.78	0.6927	0.2969	0.7968	0.1627
25.71 (L3)	293.86	0.6916	0.2964	0.7918	0.1615
32.28 (L3)	305.43	0.6901	0.2958	0.7853	0.1603
14.05 (L3)	287.20	0.7422	0.2474	0.8290	0.1316
21.26 (L3)	294.41	0.7406	0.2469	0.8224	0.1306
22.60 (L1)	295.75	0.0934	0.0907	0.0322	0.0149
24.72 (L1)	297.87	0.0946	0.0905	0.0326	0.0149
49.92 (L1)	323.07	0.1025	0.0898	0.0356	0.0148
14.74 (L1)	287.89	0.0853	0.1372	0.0306	0.0235
33.53 (L1)	305.68	0.0942	0.1359	0.0340	0.0234
50.68 (L1)	323.83	0.0976	0.1354	0.0354	0.0234

Table 2. Solubility temperatures of two phases

t/°C	T/K	Mass Fraction w1	Mass Fraction w2	Mole Fraction x1 (compiler)	Mole Fraction x2 (compiler)
125.7 (a)	398.9	0.5688	0.0520	0.3029	0.0132
144.4 (a)	417.6	0.5388	0.1020	0.2986	0.0269
175.9 (a)	449.1	0.5066	0.1556	0.2937	0.0429
90.6 (L3)	363.8	0.8073	0.1030	0.6958	0.0423
95.3 (L3)	368.5	0.7648	0.1502	0.6803	0.0636
100.3 (L3)	373.5	0.7210	0.1989	0.6633	0.0871
104.3 (L3)	377.5	0.6763	0.2486	0.6446	0.1129
109.4 (L3)	382.6	0.6304	0.2996	0.6241	0.1412
119.6 (L3)	392.8	0.1020	0.8867	0.1813	0.7506
126.5 (L3)	399.6	0.4941	0.4510	0.5522	0.2400
130.0 (L3)	403.2	0.4428	0.5080	0.5201	0.2842
131.1 (L3)	404.3	0.4074	0.5473	0.4959	0.3173
132.9 (L3)	406.1	0.3613	0.5986	0.4619	0.3645
139.2 (L3)	412.4	0.1800	0.8000	0.2863	0.6060
141.9 (L3)	415.1	0.2994	0.6673	0.4101	0.4353
43.73 (L3)	316.88	0.6887	0.2952	0.7792	0.1591
49.02 (L3)	322.17	0.6867	0.2943	0.7705	0.1573
69.9 (L3)	343.1	0.6789	0.2910	0.7384	0.1507
83.3 (L3)	356.5	0.6717	0.2879	0.7103	0.1450
93.4 (L3)	366.6	0.6635	0.2843	0.6800	0.1388
122.3 (L3)	395.5	0.6311	0.2705	0.5771	0.1178
38.22 (L3)	311.37	0.7378	0.2459	0.8107	0.1287
48.40 (L3)	321.55	0.7345	0.2449	0.7974	0.1265
58.60 (L3)	331.75	0.7313	0.2438	0.7846	0.1246
64.90 (L3)	338.05	0.7262	0.2421	0.7653	0.1215
85.2 (L3)	358.4	0.7132	0.2377	0.7184	0.1140
95.8 (L3)	369.0	0.7031	0.2344	0.6851	0.1086
38.68 (S)	311.83	0.6927	0.2969	0.7968	0.1627
38.98 (S)	312.13	0.6916	0.2964	0.7918	0.1616
39.20 (S)	312.35	0.6001	0.2958	0.7853	0.1603

Notes:
   Table 1  ^a  Critical opalescence.

Method/Apparatus/Procedure:
   The synthetic method was used. Ampoules containing mixtures were suspended from a vertical roller linked to a shaking machine, which switched on at definite time intervals. Water bath temperature was controlled with a proportional temperature regulator and checked with mercury thermometers. Close to a phase transition, heating or cooing was effected at 0.03 °/h. Solubility temperature of the liquid phase was determined both with heating and cooling, and the average taken. The thermostat contained silicone oil above 80 °C.

Source and Purity of Materials:
   (1) Source not specified; pure grade reagent; dried and repeatedly distilled in a packed glass column; no impurities detectable by gas chromatography.
   (2) Source not specified; analytical purity; purified by recrystallization; m. p. = 80.2 °C.
   (3) Twice distilled.

Estimated Errors:

   Temperature: taking ± 0.02 K for liquid phase; ± 0.05 K for solid phase; ± 0.2 K (above 373 K).

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Last updated: February 18, 2015 (Created: August 17, 2007)