Benzoic acid, 4-hydroxy-

• Formula: C₇H₆O₃
• Molecular weight: 138.1207
• IUPAC Standard InChI: InChI=1S/C7H6O3/c8-6-3-1-5(2-4-6)7(9)10/h1-4,8H,(H,9,10) Copy

  
• IUPAC Standard InChIKey: FJKROLUGYXJWQN-UHFFFAOYSA-N Copy
• CAS Registry Number: 99-96-7
• 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: Benzoic acid, p-hydroxy-; p-Hydroxybenzoic acid; p-Salicylic acid; Paraben-acid; 4-Carboxyphenol; 4-Hydroxybenzoic acid; para-Hydroxybenzoic acid; Hydroxybenzoic acid, para; Kyselina 4-hydroxybenzoova; NSC 4961; Paraben
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Phase change data
  • Gas phase ion energetics data
  • Gas Chromatography
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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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 as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.

Enthalpy of sublimation

Enthalpy of fusion

Gas phase ion energetics data

Go To: Top, Phase change data, Gas Chromatography, References, Notes

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:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

View reactions leading to C₇H₆O₃⁺ (ion structure unspecified)

Ionization energy determinations

Appearance energy determinations

De-protonation reactions

C₇H₅O₃^- +  =

By formula: C₇H₅O₃^- + H⁺ = C₇H₆O₃

Gas Chromatography

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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

Van Den Dool and Kratz RI, non-polar column, custom temperature program

View large format table.

Normal alkane RI, non-polar column, temperature ramp

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Normal alkane RI, non-polar column, custom temperature program

View large format table.

References

Go To: Top, Phase change data, Gas phase ion energetics data, Gas Chromatography, Notes

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

Armstrong, James, et al., 1979
Armstrong, N.A.; James, K.C.; Wong, C.K., Inter-relationships between solubilities, distribution coefficients and melting points of some substituted benzoic and phenylacetic acids, J. Pharm. Pharmacol., 1979, 31, 1, 627, https://doi.org/10.1111/j.2042-7158.1979.tb13606.x . [all data]

Herbert, 1967
Herbert, A.J., Transition temperatures and transition energies of the p-n-alkoxy benzoic acids, from n-propyl to n-octadecyl, Trans. Faraday Soc., 1967, 63, 555, https://doi.org/10.1039/tf9676300555 . [all data]

Davies and Jones, 1954
Davies, M.; Jones, J.I., The sublimation pressures and heats of sublimation of some carboxylic acids, Trans. Faraday Soc., 1954, 50, 1042. [all data]

King, McWhirter, et al., 1945
King, L.C.; McWhirter, M.; Barton, D.M., Reactions of Acetophenols with Iodine and Pyridine and the Preparation of Hydroxybenzoic Acids, J. Am. Chem. Soc., 1945, 67, 2089-92. [all data]

Pinto, Diogo, et al., 2005
Pinto, Susana S.; Diogo, Hermínio P.; Guedes, Rita C.; Costa Cabral, Benedito J.; Minas da Piedade, Manuel E.; Martinho Simões, José A., Energetics of Hydroxybenzoic Acids and of the Corresponding Carboxyphenoxyl Radicals. Intramolecular Hydrogen Bonding in 2-Hydroxybenzoic Acid, J. Phys. Chem. A, 2005, 109, 42, 9700-9708, https://doi.org/10.1021/jp054220g . [all data]

Sabbah and Le, 1993
Sabbah, R.; Le, T.H.D., Etude thermodynamique des trois isomeres de l'acide bydroxybenzolque, Can. J. Chem., 1993, 71, 1378-1383. [all data]

Jones, 1960
Jones, A.H., Sublimation Pressure Data for Organic Compounds., J. Chem. Eng. Data, 1960, 5, 2, 196-200, https://doi.org/10.1021/je60006a019 . [all data]

ARMSTRONG, JAMES, et al., 2011
ARMSTRONG, N.A.; JAMES, K.C.; WONG, C.K., Inter-relationships between solubilities, distribution coefficients and melting points of some substituted benzoic and phenylacetic acids, Journal of Pharmacy and Pharmacology, 2011, 31, 1, 627-631, https://doi.org/10.1111/j.2042-7158.1979.tb13606.x . [all data]

Nordström and Rasmuson, 2006
Nordström, Fredrik L.; Rasmuson, Åke C., Phase equilibria and thermodynamics ofp-hydroxybenzoic acid, J. Pharm. Sci., 2006, 95, 4, 748-760, https://doi.org/10.1002/jps.20569 . [all data]

Gracin and Rasmuson, 2002
Gracin, Sandra; Rasmuson, Åke C., Solubility of Phenylacetic Acid, p -Hydroxyphenylacetic Acid, p -Aminophenylacetic Acid, p -Hydroxybenzoic Acid, and Ibuprofen in Pure Solvents, J. Chem. Eng. Data, 2002, 47, 6, 1379-1383, https://doi.org/10.1021/je0255170 . [all data]

Heath, Singh, et al., 1992
Heath, E.A.; Singh, P.; Ebisuzaki, Y., Structure of p-hydroxybenzoic acid and p-hydroxybenzoic acid-acetone complex (2/1), Acta Crystallogr Sect C Cryst Struct Commun, 1992, 48, 11, 1960-1965, https://doi.org/10.1107/S0108270192002361 . [all data]

Benoit, 1973
Benoit, F., Substituent effects in mass spectrometry. III. Substituent effects in the dissociation of the molecular ions of para and meta subtituted benzoic acids, Org. Mass Spectrom., 1973, 7, 295. [all data]

Kebarle and McMahon, 1977
Kebarle, P.; McMahon, T.B., Intrinsic Acidities of Substituted Phenols and Benzoic Acids Determined by Gas Phase Proton Transfer Equilibria, J. Am. Chem. Soc., 1977, 99, 7, 2222, https://doi.org/10.1021/ja00449a032 . [all data]

Tret'yakov, 2008
Tret'yakov, K.V., Retention Data. NIST Mass Spectrometry Data Center., NIST Mass Spectrometry Data Center, 2008. [all data]

Jerkovic, Hegic, et al., 2010
Jerkovic, I.; Hegic, G.; Marijanovic, Z.; Bubalo, D., Organic extractives from Mentha spp. honey and the bee-stomach: methyl syringate, vomifoliol, terpenediol I, hotrienol, and other compounds, Molecules, 2010, 15, 4, 2911-2924, https://doi.org/10.3390/molecules15042911 . [all data]

Jerkovic and Marijanovic, 2010
Jerkovic, I.; Marijanovic, Z., Oak (Quercus frainetto Ten.) honeydaw honey - approach to screening of volatile organic composition and antioxidant capacity (DPPH and FRAP assay), Molecules, 2010, 15, 5, 3744-3756, https://doi.org/10.3390/molecules15053744 . [all data]

Jerkovic, Tuberso, et al., 2010
Jerkovic, I.; Tuberso, C.I.G.; Gugic, M.; Bubalo, D., Composition of Sulla (Hedysarum coronarium L.) honey solvent extractives determined by GC/MS: norisoprenoids and other volatile organic compounds, Molecules, 2010, 15, 9, 6375-6385, https://doi.org/10.3390/molecules15096375 . [all data]

Alissandrakis, Kibaris, et al., 2005
Alissandrakis, E.; Kibaris, A.C.; Tarantilis, P.A.; Harizanis, P.C.; Polissiou, M., Flavour compounds of Greek cotton honey, J. Sci. Food Agric., 2005, 85, 9, 1444-1452, https://doi.org/10.1002/jsfa.2124 . [all data]

Notes

Go To: Top, Phase change data, Gas phase ion energetics data, Gas Chromatography, References

• Symbols used in this document:
  

  AE	Appearance energy
  Tfus	Fusion (melting) point
  ΔfusH	Enthalpy of fusion
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔsubH	Enthalpy of sublimation
  ΔsubH°	Enthalpy of sublimation at standard conditions

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