IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Naphthalene with 2,4-Dinitro-1-methylbenzene

Components:
   (1) 2,4-Dinitro-1-methylbenzene; C7H6N2O4; [121-14-2]  NIST Chemistry WebBook for detail
   (2) Naphthalene; C10H8; [91-20-3]  NIST Chemistry WebBook for detail

Original Measurements:
   Kofler, A.Z., Physik. Chem., Pt. A. 1940, 187, 201-210.

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)
343.7	0.00	1.00	Solid Phase (2)
338.2	0.14	0.86	Solid Phase (2)
329.7	0.26	0.74	Solid Phase (1)
329.7	0.32	0.68	1:1 Compound
331.7	0.38	0.62	1:1 Compound
333.2	0.49	0.51	1:1 Compound
333.2	0.59	0.41	1:1 Compound
332.2	0.68	0.32	Solid Phase (1)
340.2	0.77	0.23	Solid Phase (1)
345.2	0.85	0.15	Solid Phase (1)
350.7	0.93	0.07	Solid Phase (1)
353.7	1.00	0.00	Solid Phase (1)

Notes:
     Author reports formation of a 1:1 naphthalene - 2,4-dinitro-1-methylbenzene molecular compound. Two eutectic points occur at x₁ = 0.29 and T/K = 326.2 and at x₁ = 0.66 and T/K = 330.2.

Method/Apparatus/Procedure:
   Analytical balance and a hot-stage microscope.
Binary mixtures prepared by weight. Melting point temperatures determined by thermal analysis method developed by the author, using a hot-stage microscope.

Source and Purity of Materials:
   (1) Purity and chemical source were not specified in paper.
   (2) Purity and chemical source were not specified in paper.

Estimated Errors:

   Temperature: T/K: precision ± 0.2 (compiler). x₁: ± 0.01 (compiler).