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Food safety and quality
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| |
| Flavouring |
Diacetyl |
| Synonym(s) |
Dimethylglyoxal;Dimethyldiketone |
| Latest JECFA evaluation |
1998 (Session 51) |
| Status of specification |
Full |
| Information required |
|
| Chemical name |
2,3-Butanedione |
| JECFA number |
408 |
| CAS number |
431-03-8 |
| FEMA number |
2370 |
| COE number |
752 |
| FLAVIS number |
|
| Molecular weight |
86.09 |
| Chemical formula |
C4H6O2 |
| Physical form/odour |
yellow to yellow-green liquid with a powerful, buttery odour in very dilute solution |
| Solubility |
soluble in glycerol and water; miscible with alcohol, propylene glycol, and most fixed oils |
| Solubility in ethanol |
|
| Boiling point (°C) |
87-88° |
| Assay min % |
95.0% |
| Acid value max |
|
| Refractive index |
1.393-1.397 |
| Specific gravity |
0.975-0.990 |
| Other requirements |
Solidification point: -2.0 to -4.0 |
| 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/408.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/408.gif" width="60px;"></a><br>&dname=<a href="http://www.fao.org/fileadmin/user_upload/jecfa/img/408.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/408.gif" width="60px;"></a><br> "Download")
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