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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Sodium formate with Formic acid
Components:
(1) Formic acid; CH2O2; [64-18-6]
NIST Chemistry WebBook
for detail
(2) Sodium formate; NaCHO2; [141-53-7]
NIST Chemistry WebBook
for detail
Original Measurements:
Groschuff, E., Ber Dtsch. Chem. Ges. 36, 1783, 4351 (1903).
Variables:
Temperature = 0 ºC to 85 ºC
Prepared By:
T. A. Ageyeva
Experimental Remarks:
Note:
The starting material was NaCHO
2
·CH
2
O
2
.
Experimental Data:
(Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Solubility of NaCHO
2
in CH
2
O
2
.
t/°C
Mass Fraction w
1
10
0
* Mole Fraction
1
a
Solid Phase(s)
0
22.35
16.30
NaCHO2•CH2O2
25.5
29.62
21.61
NaCHO2•CH2O2
66.5
41.08
32.06
NaCHO2•CH2O2
45.5
38.85
30.07
NaCHO2
70
41.27
32.23
NaCHO2
73
41.60
32.53
NaCHO2
85
43.09
33.88
NaCHO2
Notes:
a
These values were calculated by the compiler.
Method/Apparatus/Procedure:
The freezing point method was used to study the system.
Source and Purity of Materials:
NaCHO
2
•CH
2
O
2
was prepared by the reaction of equimolar quantities of NaCHO
2
and anhydrous formic acid and cooling. Composition of the salt: 59.66 % NaCHO
2
and 40.34 % CH
2
O
2
. No other information is given.
Estimated Errors:
Temperature: The compiler estimates that the temperature was controlled to within ± 0.5 &d