Propanoic acid, 2-methyl-
- Formula: C4H8O2
- Molecular weight: 88.1051
- IUPAC Standard InChIKey: KQNPFQTWMSNSAP-UHFFFAOYSA-N
- CAS Registry Number: 79-31-2
- 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: Isobutyric acid; α-Methylpropanoic acid; α-Methylpropionic acid; Dimethylacetic acid; Isobutanoic acid; Isopropylformic acid; 2-Methylpropanoic acid; 2-Methylpropionic acid; iso-C3H7COOH; Acetic acid, dimethyl-; Cenex RP b2; Propionic acid, 2-methyl-; Tenox IBP 2; Kyselina isomaselna; UN 2529; Methylpropanoic acid; Methylpropionic acid; 2-Propanecarboxylic acid; i-Butyric acid; NSC 62780
- 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.
Van Den Dool and Kratz RI, non-polar column, temperature ramp
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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
---|---|---|---|---|---|
Active phase | DB-5 | HP-5MS | DB-5 | DB-5 | CP-Sil 8CB-MS |
Column length (m) | 30. | 30. | 30. | 30. | 60. |
Carrier gas | N2 | He | He | He | |
Substrate | |||||
Column diameter (mm) | 0.25 | 0.25 | 0.32 | 0.32 | 0.25 |
Phase thickness (μm) | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 |
Tstart (C) | 40. | 60. | 40. | 40. | 40. |
Tend (C) | 230. | 250. | 250. | 250. | 280. |
Heat rate (K/min) | 5. | 4. | 5. | 5. | 4. |
Initial hold (min) | 2. | 2. | 2. | 2. | 2. |
Final hold (min) | 6. | 20. | 5. | 5. | 5. |
I | 792. | 785. | 790. | 793. | 765. |
Reference | Colahan-Sederstrom and Peterson, 2005 | Pino, Mesa, et al., 2005 | Wu, Zorn, et al., 2005 | Wu, Zorn, et al., 2005 | Bruna, Hierro, et al., 2003 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
Column type | Capillary | Capillary |
---|---|---|
Active phase | CP Sil 5 CB | DB-1 |
Column length (m) | 50. | 30. |
Carrier gas | He | He |
Substrate | ||
Column diameter (mm) | 0.32 | 0.32 |
Phase thickness (μm) | 0.4 | 5. |
Tstart (C) | 60. | 35. |
Tend (C) | 280. | 270. |
Heat rate (K/min) | 3. | 10. |
Initial hold (min) | 10. | 1. |
Final hold (min) | 60. | |
I | 732. | 723. |
Reference | Pino, Marbot, et al., 2001 | Bartelt, 1997 |
Comment | MSDC-RI | MSDC-RI |
References
Go To: Top, Van Den Dool and Kratz RI, non-polar column, temperature ramp, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Colahan-Sederstrom and Peterson, 2005
Colahan-Sederstrom, P.M.; Peterson, D.G.,
Inhibition of key aroma compound generated during ultrahigh-temperature processing of bovine milk via epicatechin addition,
J. Agric. Food Chem., 2005, 53, 2, 398-402, https://doi.org/10.1021/jf0487248
. [all data]
Pino, Mesa, et al., 2005
Pino, J.A.; Mesa, J.; Muñoz, Y.; Martí, M.P.; Marbot, R.,
Volatile components from mango (Mangifera indica L.) cultivars,
J. Agric. Food Chem., 2005, 53, 6, 2213-2223, https://doi.org/10.1021/jf0402633
. [all data]
Wu, Zorn, et al., 2005
Wu, S.; Zorn, H.; Krings, U.; Berger, R.G.,
Characteristic Volatiles from Young and Aged Fruiting Bodies of Wild Polyporus sulfureus (Bull.:Fr.) Fr.,
J. Agric. Food Chem., 2005, 53, 11, 4524-4528, https://doi.org/10.1021/jf0478511
. [all data]
Bruna, Hierro, et al., 2003
Bruna, J.M.; Hierro, E.M.; de la Hoz, L.; Mottram, D.S.; Fernández, M.; Ordóñez, J.A.,
Changes in selected biochemical and sensory parameters as affected by the superficial inoculation of Penicillium camemberti on dry fermented sausages,
Int. J. Food Microbiol., 2003, 85, 1-2, 111-125, https://doi.org/10.1016/S0168-1605(02)00505-6
. [all data]
Pino, Marbot, et al., 2001
Pino, J.A.; Marbot, R.; Vázquez, C.,
Characterization of volatiles in strawberry guava (Psidium cattleianum Sabine) fruit,
J. Agric. Food Chem., 2001, 49, 12, 5883-5887, https://doi.org/10.1021/jf010414r
. [all data]
Bartelt, 1997
Bartelt, R.J.,
Calibration of a commercial solid-phase microextraction device for measuring headspace concentrations of organic volatiles,
Anal. Chem., 1997, 69, 3, 364-372, https://doi.org/10.1021/ac960820n
. [all data]
Notes
Go To: Top, Van Den Dool and Kratz RI, non-polar column, temperature ramp, References
- Symbols used in this document:
Tend Final temperature Tstart Initial temperature - 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.