4-Aminobutanoic acid

• Formula: C₄H₉NO₂
• Molecular weight: 103.1198
• IUPAC Standard InChI: InChI=1S/C4H9NO2/c5-3-1-2-4(6)7/h1-3,5H2,(H,6,7) Copy

  
• IUPAC Standard InChIKey: BTCSSZJGUNDROE-UHFFFAOYSA-N Copy
• CAS Registry Number: 56-12-2
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: γ-Aminobutyric acid; 4-Aminobutyric acid; 4-Amino-n-butyric acid; γ-Amino-n-butyric acid; Butanoic acid, 4-amino-; γ-Aminobutanoic acid; Aminalon; Aminobutyric acid,-4-; Butyric acid, 4-amino-; DF 468; Gaballon; Gamarex; Gamastan; Gammagee; Gammalon; Gammalone; Gammar; Gammasol; Gamulin; Globulin, immune human serum; GABA; Immu-G; Immuglobin; Mielogen; Mielomade; Reanal; ω-Aminobutyric acid; 3-Carboxypropylamine; NSC 27418; Piperidic acid; Piperidinic acid
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• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • References
  • Notes
• Other data available:
  • Gas phase ion energetics data
  • IR Spectrum
  • Mass spectrum (electron ionization)
• Data at other public NIST sites:
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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Gas 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

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 as indicated in comments:
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Enthalpy of vaporization

Enthalpy of sublimation

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Skoulika and Sabbah, 1983
Skoulika, S.; Sabbah, R., Thermodynamique de composes azotes X. Etude thermochimique de quelques acides ω-amines, Thermochim. Acta, 1983, 61, 203-214. [all data]

Skoulika and Sabbah, 1982
Skoulika, S.; Sabbah, R., Enthalpy of formation of some ω-amino acids in the solid state, C. R. Seances Acad. Sci., Ser. 2, 1982, 295, 657-660. [all data]

Contineanu and Marchidan, 1994
Contineanu, J.; Marchidan, D.I., The enthalpies of combustion and formation of some isomers of aminobutyric (aminobutanoic) acid, Rev. Roum. Chim., 1994, 39, 1391-1395. [all data]

Strepikheev, Skuratov, et al., 1955
Strepikheev, A.A.; Skuratov, S.M.; Shtekher, S.M.; Muromova, R.S.; Brykina, E.P.; Kachinskaya, O.N., Mutual interaction of amino and carboxyl groups in amino acids, Dokl. Akad. Nauk SSSR, 1955, 102, 543-545. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Spink and Wads, 1975
Spink, C.H.; Wads, I., Thermochemistry of solutions of biochemical model compounds. 4. The partial molar heat capacities of some amino acids in aqueous solution, J. Chem. Thermodynam., 1975, 7, 561-572. [all data]

Legendre, Bac, et al., 2009
Legendre, B.; Bac, P.; German, M.; Feutelais, Yves, Low pressure phases, J Therm Anal Calorim, 2009, 98, 1, 91-95, https://doi.org/10.1007/s10973-009-0401-0 . [all data]

Notes

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• Symbols used in this document:
  

  Cp,solid	Constant pressure heat capacity of solid
  ΔcH°solid	Enthalpy of combustion of solid at standard conditions
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfH°solid	Enthalpy of formation of solid at standard conditions
  ΔsubH	Enthalpy of sublimation
  ΔsubH°	Enthalpy of sublimation at standard conditions
  ΔvapH	Enthalpy of vaporization

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