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Food safety and quality
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| Flavouring |
3-(Methylthio)propionaldehyde |
| Synonym(s) |
Methional;3-(Methylmercapto)propionaldehyde;beta-(Methylthio)propionaldehyde;beta-Methiopropionaldehyde;beta-(Methylmercapto)propionaldehyde |
| Latest JECFA evaluation |
2000 (Session 55) |
| Status of specification |
Full |
| Information required |
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| Chemical name |
3-(Methylthio)propionaldehyde |
| JECFA number |
466 |
| CAS number |
3268-49-3 |
| FEMA number |
2747 |
| COE number |
125 |
| FLAVIS number |
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| Molecular weight |
104.17 |
| Chemical formula |
C4H8OS |
| Physical form/odour |
colourless to pale yellow liquid; powerful and diffusive onion and meat-like odour; in dilution, more pleasant, less onion-like, remniscient of boullion |
| Solubility |
insoluble in water; soluble in alcohol, propylene glycol and oil |
| Solubility in ethanol |
1 ml in 1 ml 95% alcohol |
| Boiling point (°C) |
165-166° |
| Assay min % |
98% |
| Acid value max |
10 |
| Refractive index |
1.479-1.493 |
| Specific gravity |
1.037-1.052 |
| 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_add8/466.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/466.gif" width="60px;"></a><br>&dname=<a href="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/466.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/466.gif" width="60px;"></a><br> "Download")
![](fileadmin/user_upload/jecfa/img/<a href="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/466.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/img_add8/466.gif" width="60px;"></a><br>)