IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Acetonitrile with Dicarboxylic acids monosodium salts

Components:
   (1) Dicarboxylic acids monosodium salts; C2HNaO4 - C10H17NaO4; []  NIST Chemistry WebBook for detail
   (2) Acetonitrile; C2H3N; [75-05-8]  NIST Chemistry WebBook for detail

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

Variables:
   Temperature = 298 K

Prepared By:
   Valerii P. Sazonov

Experimental Data:   (Notes on the Nomenclature)

Solubility of monosodium salts of dicarboxylic acids (2) in acetonitrile (1) at 25.0 oC (298.2 K compiler)
Chemical Name	10² * Mass Fraction w₂ (compiler)	Mole Fraction x₂ (compiler)	n₁/V₂ [mol/L]
Ethanedioate; C2HNaO4; [1186-49-8]	0.13	0.0005	0.009
Propanedioate; C3H3NaO4; [2922-55-6]	0.13	0.0004	0.008
Butanedioate; C4H5NaO4; [2922-54-5]	0.10	0.0003	0.006
Pentanedioate; C5H7NaO4; [3343-88-2]	0.23	0.0006	0.012
Hexanedioate; C6H9NaO4; [18966-34-4]	0.15	0.0004	0.007
Heptanedioate; C7H11NaO4; [6142-21-8]	0.16	0.0004	0.007
Octanedioate; C8H13NaO4; [27796-70-9]	0.15	0.0003	0.006
Nonanedioate; C9H15NaO4; [17356-30-8]	0.13	0.0003	0.005
Decanedioate; C10H17NaO4; [19455-73-3]	0.11	0.0002	0.004

Notes:
   ^a  For these calculations the compiler assumed that the densities of the solutions were those of acetonitrile¹ 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 in 50 mL volumetric flasks. The flasks were closed by ground glass stoppers and stored at the required temperature in a thermostat for 45 hours, with intensive stirring every several hours. After this, 2 mL samples of the saturated solution were taken by pipette, diluted to 25 mL with water-less acetic acid and titrated by 0.05 N HClO₄ by using crystal violet indicator.

Source and Purity of Materials:
   (1) Source not specified; purity not specified; dried over anhydrous K₂CO₃ and repeatedly distilled over P₂O₅.
   (2) Obtained by mixing of methanol solutions of sodium hydroxide and the acid in stoichiometric amounts; purified by crystallization from a mixture of water and methanol; purity not less 99 mass %.

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

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