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
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Van Den Dool and Kratz RI, polar column, custom temperature program
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 | FFAP | DB-Wax | DB-Wax | FFAP | DB-Wax |
Column length (m) | 25. | 30. | 30. | 60. | 60. |
Carrier gas | He | H2 | H2 | He | He |
Substrate | |||||
Column diameter (mm) | 0.32 | 0.32 | 0.32 | 0.25 | 0.25 |
Phase thickness (μm) | 0.2 | 0.5 | 0.5 | 0.5 | 0.25 |
Program | 40C(1min) => 40C/min => 60C(1min) => 6C/min => 180C => 15C/min => 240C | 60C(3min) => 2C/min => 220C => 3C/min => 245C (20min) | 60C(3min) => 2C/min => 220C => 3C/min => 245C(20min) | 50C(3min) => 3C/min => 100C => 10C/min => 220C (13.5min) | 35C(0.7min) => 20C/min => 70C => 4C/min => 240C |
I | 1558. | 1584. | 1584. | 1595. | 1556. |
Reference | Frauendorfer and Schieberle, 2006 | Selli, Canbas, et al., 2006 | Selli, Canbas, et al., 2006, 2 | Ranau and Steinhart, 2005 | Ferrari, Lablanquie, et al., 2004 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
---|---|---|---|---|---|
Active phase | DB-Wax | Carbowax 20M | DB-Wax | DB-FFAP | DB-Wax |
Column length (m) | 30. | 25. | 30. | 30. | 60. |
Carrier gas | H2 | H2 | He | He | |
Substrate | |||||
Column diameter (mm) | 0.32 | 0.32 | 0.25 | 0.32 | 0.25 |
Phase thickness (μm) | 0.5 | 0.25 | 0.25 | 0.25 | |
Program | 60C(3min) => 2C/min => 220C => 3C/min => 245C (20min) | 40C (8min) => 3C/min => 180C => 20C/min => 230C | 20C(30s) => fast => 60C => 4C/min => 220C (20min) | 35C(2min) => 40C/min => 60C (2min) => 5C/min => 240C | 45C(4min) => 30C/min => 60C (5min) => 3C/min => 220C (40min) |
I | 1584. | 1608. | 1553. | 1562. | 1570. |
Reference | Selli, Cabaroglu, et al., 2004 | Boido, Lloret, et al., 2003 | Cantergiani, Brevard, et al., 2001 | Rychlik and Bosset, 2001 | Ziegleder, 2001 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
Column type | Capillary | Capillary | Capillary | Capillary |
---|---|---|---|---|
Active phase | FFAP | FFAP | FFAP | FFAP |
Column length (m) | 30. | 30. | 30. | 50. |
Carrier gas | He | He | He | |
Substrate | ||||
Column diameter (mm) | 0.25 | 0.32 | 0.32 | 0.25 |
Phase thickness (μm) | 0.25 | 0.25 | 0.25 | 0.25 |
Program | 35C(2min) => 40C/min => 60C => 6C/min => 180C 20C/min => 240C(10min) | 35C (2min) => 40C/min => 60C (2min) => 6C/min => 230C (10min) | 40C (2min) => 40C/min => 60C (2min) => 240C (10min) | 20C (5min) => 2C/min => 70C => 4C/min => 210C |
I | 1571. | 1565. | 1548. | 1578. |
Reference | Zimmermann and Schieberle, 2000 | Kubícková and Grosch, 1997 | Münch, Hofmann, et al., 1997 | Yasuhara, 1987 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
References
Go To: Top, Van Den Dool and Kratz RI, polar column, custom temperature program, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Frauendorfer and Schieberle, 2006
Frauendorfer, F.; Schieberle, P.,
Identification of the key aroma compounds in Cocoa powder based on molecular sensoly correlations,
J. Agr. Food Chem., 2006, 54, 15, 5521-5529, https://doi.org/10.1021/jf060728k
. [all data]
Selli, Canbas, et al., 2006
Selli, S.; Canbas, A.; Cabaroglu, T.; Erten, H.; Gunata, Z.,
Aroma components of cv. Muscat of Bornova wines and influence of skin contact treatment,
Food Chem., 2006, 94, 3, 319-326, https://doi.org/10.1016/j.foodchem.2004.11.019
. [all data]
Selli, Canbas, et al., 2006, 2
Selli, S.; Canbas, A.; Cabaroglu, T.; Erten, H.; Lepoutre, J.-P.; Gunata, Z.,
Effect of skin contact on the free and bound aroma compounds of the white wine of Vitis vinifera L. cv Narince,
Food Control, 2006, 17, 1, 75-82, https://doi.org/10.1016/j.foodcont.2004.09.005
. [all data]
Ranau and Steinhart, 2005
Ranau, R.; Steinhart, H.,
Identification and evaluation of volatile odor-active pollutants from different odor emission sources in the food industry,
Eur. Food Res. Technol., 2005, 220, 2, 226-231, https://doi.org/10.1007/s00217-004-1073-4
. [all data]
Ferrari, Lablanquie, et al., 2004
Ferrari, G.; Lablanquie, O.; Cantagrel, R.; Ledauphin, J.; Payot, T.; Fournier, N.; Guichard, E.,
Determination of key odorant compounds in freshly distilled cognac using GC-O, GC-MS, and sensory evaluation,
J. Agric. Food Chem., 2004, 52, 18, 5670-5676, https://doi.org/10.1021/jf049512d
. [all data]
Selli, Cabaroglu, et al., 2004
Selli, S.; Cabaroglu, T.; Canbas, A.; Erten, H.; Nurgel, C.; Lepoutre, J.P.; Gunata, Z.,
Volatile composition of red wine from cv. Kalecik Karasi grown in central Anatolia,
Food Chem., 2004, 85, 2, 207-213, https://doi.org/10.1016/j.foodchem.2003.06.008
. [all data]
Boido, Lloret, et al., 2003
Boido, E.; Lloret, A.; Medina, K.; Fariña, L.; Carrau, f.; Versini, G.; Dellacassa, E.,
Aroma composition of Vitis vinifera Cv. Tannat: the typical red wine from Uruguay,
J. Agric. Food Chem., 2003, 51, 18, 5408-5413, https://doi.org/10.1021/jf030087i
. [all data]
Cantergiani, Brevard, et al., 2001
Cantergiani, E.; Brevard, H.; Krebs, Y.; Feria-Morales, A.; Amadò, R.; Yeretzian, C.,
Characterisation of the aroma of green Mexican coffee and identification of mouldy/earthy defect,
Eur. Food Res. Technol., 2001, 212, 6, 648-657, https://doi.org/10.1007/s002170100305
. [all data]
Rychlik and Bosset, 2001
Rychlik, M.; Bosset, J.O.,
Flavour and off-flavour compoundsof SwissGruy ere cheese. Evaluation of potent odorants,
Int. Dairy J., 2001, 11, 11-12, 895-901, https://doi.org/10.1016/S0958-6946(01)00108-X
. [all data]
Ziegleder, 2001
Ziegleder, G.,
Odorous compounds in paperboard as influenced by recycled material and storage,
Packag. Technol. Sci., 2001, 14, 4, 131-136, https://doi.org/10.1002/pts.541
. [all data]
Zimmermann and Schieberle, 2000
Zimmermann, M.; Schieberle, P.,
Important odorants of sweet bell pepper powder (Capsicum annuum cv. annuum): differences between samples of Hungarian and Morrocan origin,
Eur. Food Res. Technol., 2000, 211, 3, 175-180, https://doi.org/10.1007/s002170050019
. [all data]
Kubícková and Grosch, 1997
Kubícková, J.; Grosch, W.,
Evaluation of potent odorants of camembert cheese by dilution and concentration techniques,
Int. Dairy J., 1997, 7, 1, 65-70, https://doi.org/10.1016/S0958-6946(96)00044-1
. [all data]
Münch, Hofmann, et al., 1997
Münch, P.; Hofmann, T.; Schieberle, P.,
Comparison of key odorants generated by thermal treatment of commercial and self-prepared yeast extracts: influence of the amino acid composition on odorant formation,
J. Agric. Food Chem., 1997, 45, 4, 1338-1344, https://doi.org/10.1021/jf960658p
. [all data]
Yasuhara, 1987
Yasuhara, A.,
Identification of Volatile Compounds in Poultry Manure by Gas Chromatography-Mass Spectrometry,
J. Chromatogr., 1987, 387, 371-378, https://doi.org/10.1016/S0021-9673(01)94539-X
. [all data]
Notes
Go To: Top, Van Den Dool and Kratz RI, polar column, custom temperature program, References
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