IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Naphthalene with 3,5-Dinitrobenzoic acid

Components:
   (1) 3,5-Dinitrobenzoic acid; C7H4N2O6; [99-34-3]  NIST Chemistry WebBook for detail
   (2) Naphthalene; C10H8; [91-20-3]  NIST Chemistry WebBook for detail

Original Measurements:
   Shinomiya, C., Nihon Kagakkai Shi. 1938, 59, 922-926.

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)
478.2	0.000	1.000	Solid Phase (2)
474.7	0.092	0.908	Solid Phase (2)
463.7	0.280	0.720	Solid Phase (2)
460.7	0.309	0.691	Solid Phase (2)
455.2	0.396	0.604	1:1 Compound
455.2	0.480	0.520	1:1 Compound
455.2	0.493	0.507	1:1 Compound
453.2	0.623	0.377	1:1 Compound
452.7	0.699	0.301	1:1 Compound
452.2	0.713	0.287	1:1 Compound
448.2	0.760	0.240	1:1 Compound
436.7	0.879	0.121	1:1 Compound
423.2	0.914	0.086	1:1 Compound
397.2	0.962	0.038	1:1 Compound
353.2	1.000	0.000	Solid Phase (1)

Notes:
     Phase diagram depicted in paper shows formation of a 1:1 naphthalene - 3,5-dinitrobenzoic acid molecular compound having a melting point of T/K = 455.2.

Method/Apparatus/Procedure:
   No experimental details given in paper. Compiler speculates that the transition temperatures were probably determined by visually observing the temperature corresponding to the first crystal formation (or complete liquefication).

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 ± 0.3 (compiler). x₁: ± 0.002 (compiler).