Acetaldehyde
- Formula: C2H4O
- Molecular weight: 44.0526
- IUPAC Standard InChIKey: IKHGUXGNUITLKF-UHFFFAOYSA-N
- CAS Registry Number: 75-07-0
- 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: Acetic aldehyde; Ethanal; Ethyl aldehyde; CH3CHO; Acetaldehyd; Aldehyde acetique; Aldeide acetica; NCI-C56326; Octowy aldehyd; Acetylaldehyde; Rcra waste number U001; UN 1089; NSC 7594
- 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 / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data)
- NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)
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, IR Spectrum, 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°liquid | -196.4 ± 1.5 | kJ/mol | Chyd | Wiberg, Crocker, et al., 1991 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid | 117.3 | J/mol*K | N/A | Lebedev and Vasil'ev, 1988 | DH |
Constant pressure heat capacity of liquid
Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
89.05 | 298.15 | Lebedev and Vasil'ev, 1988 | T = 15 to 300 K.; DH |
96.21 | 273. | Connor, Elving, et al., 1947 | DH |
IR Spectrum
Go To: Top, Condensed phase thermochemistry data, References, Notes
Data compiled by: Coblentz Society, Inc.
- GAS (100 mmHg, N2 ADDED, TOTAL PRESSURE 600 mmHg); DOW KBr FOREPRISM-GRATING; DIGITIZED BY COBLENTZ SOCIETY (BATCH I) FROM HARD COPY; 2 cm-1 resolution
- GAS (180 mmHg PRESSURE); Not specified, most likely a prism, grating, or hybrid spectrometer.; DIGITIZED BY NIST FROM HARD COPY; 4 cm-1 resolution
- SOLUTION (10% CCl4 FOR 2.6-7.5, 10% CS2 FOR 7.5-22); DOW KBr FOREPRISM-GRATING $$SPECTRAL CONTAMINATION DUE TO CCl4 AROUND 1550 CM-1 HAS BEEN SUBTRACTED; DIGITIZED BY COBLENTZ SOCIETY (BATCH I) FROM HARD COPY; 2 cm-1 resolution
References
Go To: Top, Condensed phase thermochemistry data, IR Spectrum, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Wiberg, Crocker, et al., 1991
Wiberg, K.B.; Crocker, L.S.; Morgan, K.M.,
Thermochemical studies of carbonyl compounds. 5. Enthalpies of reduction of carbonyl groups,
J. Am. Chem. Soc., 1991, 113, 3447-3450. [all data]
Lebedev and Vasil'ev, 1988
Lebedev, B.V.; Vasil'ev, V.G.,
Thermodynamics of ethanal at 0-300 K,
Zhur. Fiz. Khim., 1988, 62, 3099-3102. [all data]
Connor, Elving, et al., 1947
Connor, A.Z.; Elving, P.J.; Steingiser, S.,
Specific heat of acetaldehyde and acetaldehyde dibutyl acetal,
J. Am. Chem. Soc., 1947, 69, 1532. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, IR Spectrum, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions ΔfH°liquid Enthalpy of formation of liquid 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.