IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Sodium formate with Sodium butanoate
Components:
   (1) Sodium butanoate; NaC4H7O2; [156-54-7]  NIST Chemistry WebBook for detail
   (2) Sodium formate; NaCHO2; [141-53-7]  NIST Chemistry WebBook for detail
Original Measurements:
   Sokolov, N.M., Zh. Obshch. Khim. 24, 1581-93 (1954).

 Variables:


Prepared By:
   P. Baldini

 Experimental Remarks:
   Note: There are two eutectics: one at 252 ºC and 100x2 = 2.5; the other at 308 ºC (erroneously reported as 318 ºC in the text-compiler) and 100x2 = 89.

 Experimental Data:   (Notes on the Nomenclature)
(Please see footnotes following the table(s).)   
t/°CT/KMole Fraction2
258531  0
252525  2.5
287560  5
30157410
31258515
31859120
32459725
32760030
33360635
33761040
33961245
34161450
340613  55
340613  60
339612  65
338611  70
336609  75
331604  80
324597  85
308581  89
311584  90
322595  95
330603100
 Notes:
   a  The T/K values were calculated the compiler.

 Method/Apparatus/Procedure:
   A visual polythermal method was used. The melts were contained in glass tubes and stirred. The temperatures were measured with a Nichrome-Constantan thermouple and a 17 mV full scale millivoltmeter. The temperature readings refer to the disappearance of isotropicity in the melt on cooling.

 Source and Purity of Materials:
   The materials were prepared by reacting aqueous "chemically pure" sodium carbonate with a slight excess of the analytical grade proper acid. The solvent and excess acid were removed by heating to 160 °C.

 Estimated Errors:
   Solubility: No information is given.
   Temperature: The compiler estimates the accuracy of the temperatures to be probably ± 2 K.