Butanedioic acid, 2,3-dihydroxy- (2R,3R)-, potassium sodium salt, hydrate (1:1:1:4)
- Formula: C4H4KNaO6·H8O4
- Molecular weight: 282.2201
- IUPAC Standard InChI: InChI=1S/C4H6O6.K.Na.4H2O/c5-1(3(7)8)2(6)4(9)10;;;;;;/h1-2,5-6H,(H,7,8)(H,9,10);;;4*1H2/q;2*+1;;;;/p-2
- IUPAC Standard InChIKey: VZOPRCCTKLAGPN-UHFFFAOYSA-L
- CAS Registry Number: 6381-59-5
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Potassium sodium tartrate tetra hydrate; Sodium potassium tartrate tetrahydrate
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Phase change data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing
Temperature of phase transition
| Ttrs (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|
| 212. | crystaline, IV | crystaline, III | Dey, Som, et al., 1993 | |
| 256. | crystaline, III | crystaline, II | Dey, Som, et al., 1993 | |
| 297. | crystaline, II | crystaline, I | Dey, Som, et al., 1993 |
Enthalpy of phase transition
| ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 42.752 | 328.78 | crystaline, II | crystaline, I | Hicks and Hooley, 1938 |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 130.0 | 328.78 | crystaline, II | crystaline, I | Hicks and Hooley, 1938 |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Dey, Som, et al., 1993
Dey, P.K.; Som, K.K.; Chowdhury, K.R.; Sarkar, B.K.; Chaudhuri, B.K.,
Heat capacity anomalies in Rochelle salt (NaKC4H6O6x4H2O) studied with a conduction-type calorimeter, 1993, Phys. [all data]
Hicks and Hooley, 1938
Hicks, J.F.G., Jr.; Hooley, J.G.,
The heat capacity of potassium sodium tartrate tetrahydrate from 15 to 340°K,
J. Am. Chem. Soc., 1938, 60, 2994-2997. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Ttrs Temperature of phase transition ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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