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Food safety and quality
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| Flavouring |
Isoamyl acetoacetate |
| Synonym(s) |
Isobutyl beta-ketobutyrate;Isobutyl 3-oxobutanoate;Isoamyl beta-ketobutyrate;Isoamyl 3-oxobutanoate |
| Latest JECFA evaluation |
2000 (Session 55) |
| Status of specification |
Full |
| Information required |
|
| Chemical name |
3-Methylbutyl 3-oxobutyrate |
| JECFA number |
598 |
| CAS number |
2308-18-1 |
| FEMA number |
3551 |
| COE number |
227 |
| FLAVIS number |
|
| Molecular weight |
172.23 |
| Chemical formula |
C9H16O3 |
| Physical form/odour |
colourless liquid; ethereal, fruity, somewhat herbaceous, winey, fermented apple-like odour |
| Solubility |
insoluble in water; soluble in alcohol |
| Solubility in ethanol |
|
| Boiling point (°C) |
222-224° |
| Assay min % |
97% |
| Acid value max |
|
| Refractive index |
1.426-1.433 |
| Specific gravity |
0.954 (10°) |
| Other requirements |
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| ID Test |
IR |
| Spectrum |
 
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![](../typo3conf/ext/dyna_fef/download.php?dfile=/work/htdocs/disseminationtypo3/web/fileadmin/user_upload/jecfa/img/<a href="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/598.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/598.gif" width="60px;"></a><br>&dname=<a href="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/598.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/598.gif" width="60px;"></a><br> "Download")
![](fileadmin/user_upload/jecfa/img/<a href="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/598.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/598.gif" width="60px;"></a><br>)