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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Sodium formate with Water
Components:
(1) Sodium formate; NaCHO2; [141-53-7]
NIST Chemistry WebBook
for detail
(2) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Groschuff, E., Ber Dtsch. Chem. Ges. 36, 1783, 4351 (1903).
Variables:
Temperature = -20 ºC to 123 ºC
Prepared By:
Chr. Balarew and St. Trendafilova
Experimental Remarks:
Note:
When equivalent amounts of sodium formate and anhydrous formic acid are mixed in the cold, NaCHO
2
·CH
2
O
2
is formed. A heating curve indicates that this salt decomposes at 65 °C.
Experimental Data:
(Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Composition of equilibrium liquid phase.
t/°C
Phase
Mass Fraction w
1
m
1
[mol kg-1]
a
Solid Phase(s)
-20
Liquid
22.80
4.34
NaCHO2•3H2O
0
Liquid
30.47
6.44
NaCHO2•3H2O
15
Liquid
41.88
10.59
NaCHO2•3H2O
18
Liquid
44.92
11.99
NaCHO2•3H2O
18
Liquid
44.73
11.90
NaCHO2•2H2O
21
Liquid
46.86
12.96
NaCHO2•2H2O
23
Liquid
48.22
13.69
NaCHO2•2H2O
25.5
Liquid
50.53
15.02
NaCHO2•2H2O
18
Liquid
49.22
14.25
NaCHO2
25.5
Liquid
49.95
14.67
NaCHO2
29
Liquid
50.44
14.96
NaCHO2
54
Liquid
53.80
17.12
NaCHO2
74.5
Liquid
56.82
19.35
NaCHO2
100.5
Liquid
61.54
23.52
NaCHO2
123
Liquid
66.20
28.79
NaCHO2
Notes:
a
These values were calculated by the compilers.
Method/Apparatus/Procedure:
No information is given, but it appears that the analysis for Na was done gravimetrically by weighing sodium sulfate.
Source and Purity of Materials:
No information is given.
Estimated Errors:
Solubility: No information is given.
Temperature: No information is given.