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Food safety and quality
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| |
| Flavouring |
2-Acetyl-5-methylthiophene |
| Synonym(s) |
2-Methyl-5-acetylthiophene;1-(5-Methyl-thienyl)ethan-1-one |
| Latest JECFA evaluation |
2012 (Session 76) |
| Status of specification |
Full |
| Information required |
|
| Chemical name |
1-(5-Methylthiophen-2-yl)ethanone |
| JECFA number |
2107 |
| CAS number |
13679-74-8 |
| FEMA number |
4643 |
| COE number |
|
| FLAVIS number |
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| Molecular weight |
140.2 |
| Chemical formula |
C7H8OS |
| Physical form/odour |
Colourless to pale yellow liqud to crystalline powder at lower temperatures; Roasted aroma with sweet notes |
| Solubility |
Very slightly soluble in water |
| Solubility in ethanol |
Soluble |
| Boiling point (°C) |
232-234° |
| Assay min % |
95% |
| Acid value max |
|
| Refractive index |
1.557-1.567 |
| Specific gravity |
1.120-1.130 (20°) |
| Other requirements |
m.p. 24-28° |
| 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/jecfa76/2107-ir.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/jecfa76/2107-ir.gif" width="60px;"></a><br>&dname=<a href="http://www.fao.org/fileadmin/user_upload/jecfa/img/jecfa76/2107-ir.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/jecfa76/2107-ir.gif" width="60px;"></a><br> "Download")
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