3-Mercaptopropionic acid

• Formula: C₃H₆O₂S
• Molecular weight: 106.144
• IUPAC Standard InChI: InChI=1S/C3H6O2S/c4-3(5)1-2-6/h6H,1-2H2,(H,4,5) Copy

  
• IUPAC Standard InChIKey: DKIDEFUBRARXTE-UHFFFAOYSA-N Copy
• CAS Registry Number: 107-96-0
• 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: 3-Mercaptopropanoic acid; β-Mercaptopropionic acid; Propanoic acid, 3-mercapto-; β-Thiopropionic acid; Hydracrylic acid, 3-thio-; Mercaptopropionic acid; Propionic acid, 3-mercapto-; 3-Thiopropionic acid; 3MPA; 3-Thiopropanoic acid; 2-Mercaptoethanecarboxylic acid; NSC 437; β-Mercaptopropanoic acid; 3-Thiolpropanoic acid
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• Information on this page:
  • Phase change data
  • Gas phase ion energetics data
  • Gas Chromatography
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • IR Spectrum
  • Mass spectrum (electron ionization)
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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
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Reduced pressure boiling point

Enthalpy of fusion

Entropy 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: John E. Bartmess

De-protonation reactions

C₃H₅O₂S^- +  =

By formula: C₃H₅O₂S^- + H⁺ = C₃H₆O₂S

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

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

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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.

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

Huffman and Ellis, 1935
Huffman, H.M.; Ellis, E.L., Thermal data. III. The heat capacities, entropies and free energies of four organic compounds containing sulfur, J. Am. Chem. Soc., 1935, 57, 46-48. [all data]

Caldwell, Renneboog, et al., 1989
Caldwell, G.; Renneboog, R.; Kebarle, P., Gas Phase Acidities of Aliphatic Carboxylic Acids, Based on Measurements of Proton Transfer Equilibria, Can. J. Chem., 1989, 67, 4, 661, https://doi.org/10.1139/v89-092 . [all data]

Hofmann and Schieberle, 1997
Hofmann, T.; Schieberle, P., Identification of potent aroma compounds in thermally treated mixtures of glucose/cysteine and rhamnose/cysteine using aroma extract dilution techniques, J. Agric. Food Chem., 1997, 45, 3, 898-906, https://doi.org/10.1021/jf960456t . [all data]

Hofmann and Schieberle, 1995
Hofmann, T.; Schieberle, P., Evaluation of the key odorants in a thermally treated solution of ribose and cysteine by aroma extract dilution techniques, J. Agric. Food Chem., 1995, 43, 8, 2187-2194, https://doi.org/10.1021/jf00056a042 . [all data]

Notes

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

• Symbols used in this document:
  

  Tboil	Boiling point
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions

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