Propanal, 2-methyl-
- Formula: C4H8O
- Molecular weight: 72.1057
- IUPAC Standard InChI: InChI=1S/C4H8O/c1-4(2)3-5/h3-4H,1-2H3
- IUPAC Standard InChIKey: AMIMRNSIRUDHCM-UHFFFAOYSA-N
- CAS Registry Number: 78-84-2
- 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: Isobutyraldehyde; α-Methylpropionaldehyde; Isobutanal; Isopropylaldehyde; Isopropylformaldehyde; 2-Methylpropanal; 2-Methylpropionaldehyde; iso-C3H7CHO; Isobutylaldehyde; Isobutyric aldehyde; 2-Methyl-1-propanal; Isobutyraldehyd; Propionaldehyde, 2-methyl-; Valine aldehyde; Isobutaldehyde; Isobutyryl aldehyde; Methyl propanal; NCI-C60968; UN 2045; Isobutyral; NSC 6739; 2-methylpropanal (isobutanal)
- 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.
Phase change 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:
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
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tboil | 336. ± 2. | K | AVG | N/A | Average of 24 out of 27 values; Individual data points |
| Quantity | Value | Units | Method | Reference | Comment |
| Tfus | 201.00 | K | N/A | Tjebbes, 1962 | Uncertainty assigned by TRC = 0.5 K; TRC |
| Tfus | 207.3 | K | N/A | Anonymous, 1958 | Uncertainty assigned by TRC = 2. K; TRC |
| Tfus | 145. | K | N/A | Cook, 1952 | Uncertainty assigned by TRC = 3. K; TRC |
| Tfus | 207.3 | K | N/A | Timmermans, 1922 | Uncertainty assigned by TRC = 0.4 K; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔvapH° | 32.0 ± 0.9 | kJ/mol | AVG | N/A | Average of 7 values; Individual data points |
Enthalpy of vaporization
| ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 31.4 | 318. | N/A | Eng and Sandler, 1984 | Based on data from 313. to 324. K.; AC |
| 31.8 | 324. | N/A | Brazhnikov, Peshchenko, et al., 1976 | Based on data from 309. to 337. K.; AC |
| 33.4 | 340. | EB | Wojtasinski, 1963 | Based on data from 333. to 347. K.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | A | B | C | Reference | Comment |
|---|---|---|---|---|---|
| 286.08 to 336.00 | 3.87395 | 1060.141 | -63.196 | Seprakova, Paulech, et al., 1959 | Coefficents calculated by NIST from author's data. |
References
Go To: Top, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Tjebbes, 1962
Tjebbes, J.,
Acta Chem. Scand., 1962, 16, 953. [all data]
Anonymous, 1958
Anonymous, R.,
, Am. Pet. Inst. Res. Proj. 45, Ohio State Univ., 1958. [all data]
Cook, 1952
Cook, N.C.,
, Unpublished, Final Rep. Stand. Proj. on Oxygenated Compounds, Penn. State Univ., College Park, PA, 1952. [all data]
Timmermans, 1922
Timmermans, J.,
Investigation of the Freezing Point of Organic Substances VII,
Bull. Soc. Chim. Belg., 1922, 31, 389. [all data]
Eng and Sandler, 1984
Eng, Robert; Sandler, Stanley I.,
Vapor-liquid equilibria for three aldehyde/hydrocarbon mixtures,
J. Chem. Eng. Data, 1984, 29, 2, 156-161, https://doi.org/10.1021/je00036a017
. [all data]
Brazhnikov, Peshchenko, et al., 1976
Brazhnikov, M.M.; Peshchenko, A.D.; Ral'ko, O.V.,
Zh. Prikl. Khim. (Leningrad), 1976, 49, 1041. [all data]
Wojtasinski, 1963
Wojtasinski, Jerome G.,
Measurement of Total Pressures for Determining Liquid-Vapor Equilibrium Relations of the Binary System Isobutyraldehyde n-Butyraldehyde.,
J. Chem. Eng. Data, 1963, 8, 3, 381-385, https://doi.org/10.1021/je60018a028
. [all data]
Seprakova, Paulech, et al., 1959
Seprakova, M.; Paulech, J.; Dykyj, J.,
Dampfdruck der Butyraldehyde,
Chem. Zvesti, 1959, 13, 313-316. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Tboil Boiling point Tfus Fusion (melting) point ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization 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.