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)
- IUPAC Standard InChIKey: DKIDEFUBRARXTE-UHFFFAOYSA-N
- 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
View 3d structure (requires JavaScript / HTML 5) - 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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Condensed phase thermochemistry data
Go To: Top, Phase change data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°liquid | 54.71 | cal/mol*K | N/A | Huffman and Ellis, 1935 | Extrapolation below 90 K, 49.71 J/mol*K. |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 48.40 | 299.8 | Huffman and Ellis, 1935 | T = 85 to 310 K. Value is unsmoothed experimental datum. |
Phase change data
Go To: Top, Condensed phase thermochemistry data, 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:
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
| Tboil (K) | Pressure (atm) | Reference | Comment |
|---|---|---|---|
| 384.2 | 0.020 | Weast and Grasselli, 1989 | BS |
| 358.7 | 0.004 | Weast and Grasselli, 1989 | BS |
Enthalpy of fusion
| ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 4.056 | 291.9 | Domalski and Hearing, 1996 | AC |
| 4.0569 | 291.9 | Huffman and Ellis, 1935 | DH |
Entropy of fusion
| ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 13.9 | 291.9 | Huffman and Ellis, 1935 | DH |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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]
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]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions Tboil Boiling point ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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