IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitromethane with Heptanedioic acid

Components:
   (1) Heptanedioic acid; C7H12O4; [111-16-0]  NIST Chemistry WebBook for detail
   (2) Nitromethane; CH3NO2; [75-52-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Smagowski, H., Zesz. Nauk. Wydz. Mat., Fiz. Chem., Univ. Gdanski, Chem. 3, 45-53 (1974).

Variables:
   Temperature = 273 K to 308 K

Prepared By:
   V. P. Sazonov

Experimental Data:   (Notes on the Nomenclature)

Solubility of heptanedioic acid in nitromethane
t/°C	T/K	Concentration c₁ [mol/L]	10² * Mass Fraction w₂ (compiler)	Mole Fraction x₂ (compiler)
0	273.2	0.003	0.04	0.0002
15.0	288.2	0.005	0.07	0.0002
25.0	298.2	0.008	0.11	0.0004
35.0	308.2	0.014	0.20	0.0008

Notes:
   ^a  The densities of the solutions were taken to be by the compiler those of nitromethane (Timmermans¹) at the specified temperatures.

Method/Apparatus/Procedure:
   The titration method was used: 25 mL of (1) and an amount of (2) exceeding the solubility were placed into 50 mL volumetric flasks. The flasks were closed by ground stoppers and were stored at the required temperature in a thermostat for 45 hours, with intensive stirring every several hours. After this, 5 mL samples of the saturated solution were taken by pipette, diluted to 25 mL with nitromethane and titrated against 0.07 N tetrabutylammonium hydroxide solution.

Source and Purity of Materials:
   (1) Source not specified; purity not specified; dried over P₂O₅ and distilled at reduced pressure.
   (2) Source not specified; purity not specified; purified by crystallization from ethyl acetate.

Estimated Errors:
   Solubility: Not reported.
   Temperature: Not reported.
   Pressure: Not reported.

References:
   ¹ J. Timmermans, Physico-Chemical Constants of Pure Organic Compounds (Elsevier, New York, 1950).