Isophthalic acid

• Formula: C₈H₆O₄
• Molecular weight: 166.1308
• IUPAC Standard InChI: InChI=1S/C8H6O4/c9-7(10)5-2-1-3-6(4-5)8(11)12/h1-4H,(H,9,10)(H,11,12) Copy

  
• IUPAC Standard InChIKey: QQVIHTHCMHWDBS-UHFFFAOYSA-N Copy
• CAS Registry Number: 121-91-5
• 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: 1,3-Benzenedicarboxylic acid; m-Benzenedicarboxylic acid; m-Phthalic acid; Benzene,1,3-dicarboxylic acid; Acide isophtalique; Kyselina isoftalova; IPA; m-Dicarboxybenzene; NSC 15310
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• Information on this page:
  • Phase change data
  • Gas phase ion energetics data
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • IR Spectrum
• Options:
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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 sublimation

Enthalpy of fusion

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: Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

Appearance energy determinations

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

UV/Visible 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: Victor Talrose, Alexander N. Yermakov, Alexy A. Usov, Antonina A. Goncharova, Axlexander N. Leskin, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

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.

Sabbah and Perez, 1999
Sabbah, Raphaël; Perez, Laurence, Étude thermodynamique des acides phtalique, isophtalique et téréphtalique, Revue canadienne de chimie, 1999, 77, 9, 1508-1513, https://doi.org/10.1139/cjc-77-9-1508 . [all data]

Kozyro, Maksimuk, et al., 2000
Kozyro, A.A.; Maksimuk, Yu.V.; Kabo, G.Ya., Thermodynamics of vaporization of phthalic acids and additivity of enthalpies and entropies of sublimation of benzocarboxylic acids, Zh. Prikl. Khim. (S.-Peterburg), 2000, 73, 2, 199. [all data]

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]

Kraus, Beranek, et al., 1962
Kraus, M.; Beranek, L.; Kochloeff, K.; Bazant, V., Chem. Prum., 1962, 12, 649. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press Inc., London, 1970, 643. [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]

Lang (editor), 1968
Lang (editor), L., Absorption Spectra in the Ultraviolet and Visible Region, 1968, 11, 105. [all data]

Notes

Go To: Top, Phase change data, Gas phase ion energetics data, Mass spectrum (electron ionization), UV/Visible spectrum, References

• Symbols used in this document:
  

  AE	Appearance energy
  ΔfusH	Enthalpy of fusion
  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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