2-Thiophenecarboxylic acid

• Formula: C₅H₄O₂S
• Molecular weight: 128.149
• IUPAC Standard InChI: InChI=1S/C5H4O2S/c6-5(7)4-2-1-3-8-4/h1-3H,(H,6,7) Copy

  
• IUPAC Standard InChIKey: QERYCTSHXKAMIS-UHFFFAOYSA-N Copy
• CAS Registry Number: 527-72-0
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: α-Thiophenecarboxylic acid; 2-Thenoic acid; 2-Thiophenic acid; Thiophene-2-carboxylic acid; Thenoic acid; 2-Carboxythiophene; 2-TCA
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• Information on this page:
  • Phase change data
  • Gas Chromatography
  • References
  • Notes
• Other data available:
  • Gas phase ion energetics data
  • 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 as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of sublimation

Enthalpy of fusion

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

Normal alkane RI, non-polar column, temperature ramp

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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.

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]

Bradley and Care, 1953
Bradley, R.S.; Care, A.D., The vapour pressure and lattice energy of hydrogen-bonded crystals: III 2- thenoic, 2-furoic, and pyrrole-2-carboxylic acids, J. Chem. Soc., 1953, 1953, 1688-90. [all data]

Dykyj, Svoboda, et al., 1999
Dykyj, J.; Svoboda, J.; Wilhoit, R.C.; Frenkel, M.L.; Hall, K.R., Vapor Pressure of Chemicals: Part A. Vapor Pressure and Antoine Constants for Hydrocarbons and Sulfur, Selenium, Tellurium and Hydrogen Containing Organic Compounds, Springer, Berlin, 1999, 373. [all data]

Bradley and Care, 1953, 2
Bradley, R.S.; Care, A.D., 348. The vapour pressure and lattice energy of hydrogen-bonded crystals. Part III. 2-Thenoic, 2-furoic, and pyrrole-2-carboxylic acids, J. Chem. Soc., 1953, 1688, https://doi.org/10.1039/jr9530001688 . [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]

Victoria Roux, Temprado, et al., 2003
Victoria Roux, Maria; Temprado, Manuel; Jiménez, Pilar; Zenón Dávalos, Juan; Foces-Foces, Concepción; Victoria Garcia, Maria; Isabel Redondo, Maria, Thermophysical, crystalline and infrared studies of the 2- and 3-thiophenecarboxylic acids, Thermochimica Acta, 2003, 404, 1-2, 235-244, https://doi.org/10.1016/S0040-6031(03)00188-6 . [all data]

Tai and Ho, 1998
Tai, C.-Y.; Ho, C.-T., Influence of glutathione oxidation and pH on thermal formation of Maillard-type volatile compounds, J. Agric. Food Chem., 1998, 46, 6, 2260-2265, https://doi.org/10.1021/jf971111t . [all data]

Notes

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• Symbols used in this document:
  

  Tboil	Boiling point
  Tfus	Fusion (melting) point
  ΔfusH	Enthalpy of fusion
  ΔsubH	Enthalpy of sublimation

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