trans-Cinnamic acid
- Formula: C9H8O2
- Molecular weight: 148.1586
- IUPAC Standard InChI: InChI=1S/C9H8O2/c10-9(11)7-6-8-4-2-1-3-5-8/h1-7H,(H,10,11)/b7-6+
- IUPAC Standard InChIKey: WBYWAXJHAXSJNI-VOTSOKGWSA-N
- CAS Registry Number: 140-10-3
- 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) - Stereoisomers:
- Other names: 2-Propenoic acid, 3-phenyl-, (E)-; Cinnamic acid, (E)-; (E)-Cinnamic acid; trans-β-Carboxystyrene; trans-3-Phenyl-2-propenoic acid; trans-3-Phenylacrylic Acid; (E)-3-Phenyl-2-propenoic acid; (2E)-3-Phenyl-2-propenoic acid; (E)-3-Phenylacrylic acid; 2-Propenoic acid, 3-phenyl-, (2E)-; NSC 44010; Cinnamic acid
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- Options:
Data at NIST subscription sites:
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
Condensed phase thermochemistry data
Go To: Top, 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°solid | -325.3 | kJ/mol | Ccb | Zavoianu, Ciocazan, et al., 1990 | ALS |
| ΔfH°solid | -337.0 | kJ/mol | Ccb | Parks and Mosher, 1962 | ALS |
| ΔfH°solid | -340. | kJ/mol | Ccb | Landrieu, Baylocq, et al., 1929 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -4359.3 | kJ/mol | Ccb | Zavoianu, Ciocazan, et al., 1990 | Corresponding ΔfHºsolid = -326. kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -4348. ± 2. | kJ/mol | Ccb | Parks and Mosher, 1962 | Corresponding ΔfHºsolid = -336.9 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -4344.7 | kJ/mol | Ccb | Landrieu, Baylocq, et al., 1929 | Corresponding ΔfHºsolid = -340. kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 197.5 | 323. | Satoh and Sogabe, 1939 | T = 0 to 100°C. Mean value.; DH |
References
Go To: Top, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Zavoianu, Ciocazan, et al., 1990
Zavoianu, D.; Ciocazan, I.; Moga-Gheorghe, S.; Bornaz, C.,
Structure and reactivity of acids. Heats of combustion and formation of some phenylacrylic acids.,
Rev. Chim. (Bucharest), 1990, 41, 234-236. [all data]
Parks and Mosher, 1962
Parks, G.S.; Mosher, H.P.,
Heats of combustion and formation of seven organic compounds containing oxygen,
J. Chem. Phys., 1962, 37, 919-920. [all data]
Landrieu, Baylocq, et al., 1929
Landrieu, P.; Baylocq, F.; Johnson, J.R.,
Etude thermochimique dans la serie furanique,
Bull. Soc. Chim. France, 1929, 45, 36-49. [all data]
Satoh and Sogabe, 1939
Satoh, S.; Sogabe, T.,
The specific heats of some solid aromatic acids and their ammonium salts and the atomic heat of nitrogen,
Sci. Pap. Inst. Phys. Chem. Res. (Tokyo), 1939, 36, 449-457. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.
© 2026 by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved.
Copyright for NIST Standard Reference Data is governed by the Standard Reference Data Act.