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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Indole with 2-Methylnaphthalene
Components:
(1) 2-Methylnaphthalene; C11H10; [91-57-6]
NIST Chemistry WebBook
for detail
(2) Indole; C8H7N; [120-72-9]
NIST Chemistry WebBook
for detail
Original Measurements:
Szafranski, A.M.; Wyrzykowska-Stankiewicz, D., Int. DATA Ser., Ser. A 1984, 48.
Variables:
Temperature = Temperature
Prepared By:
W.E. Acree, Jr.
Experimental Data:
(Notes on the Nomenclature)
T/K
Mole Fraction x
1
Mole Fraction x
2
Comment(s)
307.69
0.0000
1.0000
Solid Phase (2)
301.75
0.1188
0.8812
Solid Phase (2)
296.05
0.2328
0.7672
Solid Phase (2)
290.45
0.3422
0.6578
Solid Phase (2)
284.75
0.4473
0.5527
Solid Phase (2)
284.50
0.4678
0.5322
Solid Phase (1)
285.65
0.4815
0.5185
Solid Phase (1)
290.65
0.5483
0.4517
Solid Phase (1)
298.65
0.6455
0.3545
Solid Phase (1)
305.55
0.7391
0.2609
Solid Phase (1)
311.95
0.8292
0.1708
Solid Phase (1)
318.35
0.9161
0.0839
Solid Phase (1)
324.95
1.0000
0.0000
Solid Phase (1)
Notes:
Compiler: Eutectic point occurs at about x
1
= 0.466 and T/K = 284.3.
Method/Apparatus/Procedure:
Constant temperature bath and a precision thermometer. Mixtures of known concentrations sealed in glass ampoules and placed in constant temperature to equilibrate. Samples were rotated while bath temperature slowly increased. Solubility determined by visual noting the same temperature at which the last trace of solid solute disappeared.
Source and Purity of Materials:
(1) Pure Grade, Inst. Chem. Przerobki Wegla, Zabrze, Poland, was recrystallized thrice from aqueous-methanol.
(2) Pure Grade, Inst. Chem. Przerobki Wegla, was recrystallized thrice from methanol.
Estimated Errors:
Temperature: T/K: precision ± 0.1. x
1
: ± 0.0005.