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Food safety and quality
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| Flavouring |
1,9-Nonanedithiol |
| Synonym(s) |
Nonamethylene dimercaptan;1,9-Dimercaptononane |
| Latest JECFA evaluation |
2002 (Session 59) |
| Status of specification |
Full |
| Information required |
|
| Chemical name |
1,9-Nonanedithiol |
| JECFA number |
542 |
| CAS number |
3489-28-9 |
| FEMA number |
3513 |
| COE number |
11558 |
| FLAVIS number |
|
| Molecular weight |
192.38 |
| Chemical formula |
C9H20S2 |
| Physical form/odour |
|
| Solubility |
insoluble in water; miscible in oils |
| Solubility in ethanol |
|
| Boiling point (°C) |
284° |
| Assay min % |
95% +2.1% 1,2-dithiacycloundecane (equil. mix) |
| Acid value max |
|
| Refractive index |
1.4999-1.5099 |
| Specific gravity |
0.952-0.957 |
| Other requirements |
|
| ID Test |
NMR, 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/542.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/542.gif" width="60px;"></a><br>&dname=<a href="http://www.fao.org/fileadmin/user_upload/jecfa/img/542.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/542.gif" width="60px;"></a><br> "Download")
![](fileadmin/user_upload/jecfa/img/<a href="http://www.fao.org/fileadmin/user_upload/jecfa/img/542.gif" target=_blank><img src="http://www.fao.org/fileadmin/user_upload/jecfa/img/542.gif" width="60px;"></a><br>)