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
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• 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
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • Gas phase ion energetics data
• 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

IR Spectrum

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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: Timothy J. Johnson, Tanya L. Myers, Yin-Fong Su, Russell G. Tonkyn, Molly Rose K. Kelly-Gorham, and Tyler O. Danby

Condensed Phase Spectrum

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Additional Data

Mass spectrum (electron ionization)

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

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.

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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