Acetic acid, hydroxy-

• Formula: C₂H₄O₃
• Molecular weight: 76.0514
• IUPAC Standard InChI: InChI=1S/C2H4O3/c3-1-2(4)5/h3H,1H2,(H,4,5) Copy

  
• IUPAC Standard InChIKey: AEMRFAOFKBGASW-UHFFFAOYSA-N Copy
• CAS Registry Number: 79-14-1
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: Glycolic acid; α-Hydroxyacetic acid; Glycollic acid; Hydroxyacetic acid; Hydroxyethanoic acid; HOCH2COOH; Kyselina glykolova; Kyselina hydroxyoctova; 2-Hydroxyacetic acid; 2-Hydroxyethanoic acid; NSC 166
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• Information on this page:
  • Phase change data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data
  • IR Spectrum
  • Mass spectrum (electron ionization)
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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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: William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Gas phase ion energetics 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: John E. Bartmess

De-protonation reactions

C₂H₃O₃^- +  =

By formula: C₂H₃O₃^- + H⁺ = C₂H₄O₃

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.

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Caldwell, Renneboog, et al., 1989
Caldwell, G.; Renneboog, R.; Kebarle, P., Gas Phase Acidities of Aliphatic Carboxylic Acids, Based on Measurements of Proton Transfer Equilibria, Can. J. Chem., 1989, 67, 4, 661, https://doi.org/10.1139/v89-092 . [all data]

Notes

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• Symbols used in this document:
  

  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔvapH	Enthalpy of vaporization

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