IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Indole with Diphenyl ether

Components:
   (1) Diphenyl ether; C12H10O; [101-84-8]  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, 50.

Variables:
   Temperature = Temperature

Prepared By:
   W.E. Acree, Jr.

Experimental Data:   (Notes on the Nomenclature)


T/K	Mole Fraction x₁	Mole Fraction x₂	Comment(s)
300.00	0.0000	1.0000	Solid Phase (2)
294.15	0.1390	0.8610	Solid Phase (2)
291.55	0.2041	0.7959	Solid Phase (2)
289.05	0.2664	0.7336	Solid Phase (2)
283.75	0.3837	0.6163	Solid Phase (2)
282.35	0.4116	0.5884	Solid Phase (2)
281.75	0.4389	0.5611	Solid Phase (1)
286.15	0.4920	0.5080	Solid Phase (1)
294.55	0.5923	0.4077	Solid Phase (1)
301.15	0.6855	0.3145	Solid Phase (1)
307.95	0.7722	0.2278	Solid Phase (1)
313.85	0.8532	0.1468	Solid Phase (1)
324.95	1.0000	0.0000	Solid Phase (1)

Notes:
     Compiler: Eutectic point occurs at about x₁ = 0.433 and T/K = 281.2.

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, Fabryka Odczynnikow Chem., Gliwice, Poland, was distilled before use.

Estimated Errors:

   Temperature: T/K: precision ± 0.1. x₁: ± 0.0005.