1,2,3-Propanetricarboxylic acid, 2-hydroxy-, hydrate (1:1)

• Formula: C₆H₈O₇·H₂O
• Molecular weight: 210.1388
• IUPAC Standard InChI: InChI=1S/C6H8O7.H2O/c7-3(8)1-6(13,5(11)12)2-4(9)10;/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12);1H2 Copy

  
• IUPAC Standard InChIKey: YASYEJJMZJALEJ-UHFFFAOYSA-N Copy
• CAS Registry Number: 5949-29-1
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: Citric acid monohydrate; 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, monohydrate; Citric acid monohydrat; citric acid
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• Information on this page:
  • Condensed phase thermochemistry data
  • Phase change data
  • References
  • Notes
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Condensed phase thermochemistry 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of solid

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

Enthalpy of phase transition

Entropy of phase transition

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.

Chappel and Hoare, 1958
Chappel, F.P.; Hoare, F.E., The heat of combustion of citric acid monohydrate, Trans. Faraday Soc., 1958, 54, 367-371. [all data]

Evans, Hoare, et al., 1962
Evans, D.M.; Hoare, F.E.; Melia, T.P., Heat capacity, enthalpy and entropy of citric acid monohydrate, Trans. Faraday Soc., 1962, 58, 1511-1514. [all data]

De Kruif, Van Miltenburg, et al., 1982
De Kruif, C.G.; Van Miltenburg, J.C.; Sprenkels, A.J.J.; Stevens, G., Thermodynamic properties of citric acid and the system citric acid-water, Thermochim. Acta, 1982, 58, 341-354. [all data]

Notes

Go To: Top, Condensed phase thermochemistry data, Phase change data, References

• Symbols used in this document:
  

  Cp,solid	Constant pressure heat capacity of solid
  S°solid,1 bar	Entropy of solid at standard conditions (1 bar)
  ΔHtrs	Enthalpy of phase transition
  ΔStrs	Entropy of phase transition
  ΔcH°solid	Enthalpy of combustion of solid at standard conditions
  ΔfH°solid	Enthalpy of formation of solid at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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