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Food safety and quality
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| Flavouring |
1-Methyl-2,3-cyclohexadione |
| Synonym(s) |
3,5,5-Trimethyl-1,2-cyclohexanedione;2-Hydroxyisophorone |
| Latest JECFA evaluation |
1998 (Session 51) |
| Status of specification |
Full |
| Information required |
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| Chemical name |
1-Methylcyclohexa-2,3-dione |
| JECFA number |
425 |
| CAS number |
3008-43-3 |
| FEMA number |
3305 |
| COE number |
2311 |
| FLAVIS number |
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| Molecular weight |
126.16 |
| Chemical formula |
C7H10O2 |
| Physical form/odour |
off white to light yellowish-brown powder with a burnt, sweet odour |
| Solubility |
insoluble in water |
| Solubility in ethanol |
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| Boiling point (°C) |
69-72° (1 mm Hg) |
| Assay min % |
98.0% |
| Acid value max |
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| Refractive index |
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| Specific gravity |
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| Other requirements |
Melting range 57-63° |
| 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/425.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/425.gif" width="60px;"></a><br>&dname=<a href="http://www.fao.org/fileadmin/user_upload/jecfa/img/425.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/425.gif" width="60px;"></a><br> "Download")
![](fileadmin/user_upload/jecfa/img/<a href="http://www.fao.org/fileadmin/user_upload/jecfa/img/425.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/425.gif" width="60px;"></a><br>)