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Food safety and quality
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| Flavouring |
Methyl-alpha-ionone |
| Synonym(s) |
alpha-Cyclocitrylidene methyl ethyl ketone;Raldeine;alpha-Cetone;alpha-Cyclocitrylidene butanone;alpha-n-Methylionone |
| Latest JECFA evaluation |
2000 (Session 55) |
| Status of specification |
Full |
| Information required |
|
| Chemical name |
5-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-4-penten-3-one |
| JECFA number |
398 |
| CAS number |
127-42-4 |
| FEMA number |
2711 |
| COE number |
143 |
| FLAVIS number |
|
| Molecular weight |
206.33 |
| Chemical formula |
C14H22O |
| Physical form/odour |
yellowish, oily liquid |
| Solubility |
|
| Solubility in ethanol |
|
| Boiling point (°C) |
238° |
| Assay min % |
90% (minimum 95% sum of methyl ionone isomers) |
| Acid value max |
|
| Refractive index |
1.498-1.503 |
| Specific gravity |
0.921-0.930 |
| 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_add8/398.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/398.gif" width="60px;"></a><br>&dname=<a href="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/398.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/398.gif" width="60px;"></a><br> "Download")
![](fileadmin/user_upload/jecfa/img/<a href="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/398.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/398.gif" width="60px;"></a><br>)