Flavor ingredient regulatory record
10-Undecen-2-one
10-Undecen-2-one is a ketone in the fruity family, FEMA GRAS under FEMA number 4406 (CAS 36219-73-5). Its odor is fruity, sweet, floral, green, waxy.
- FEMA
- 4406
- CAS
- 36219-73-5
- JECFA
- 1849
- Formula
- C11H20O
GRAS status: FEMA GRAS, publication 23. Recorded by FDA in the Substances Added to Food inventory under CAS 36219-73-5.
Structure
Identity
Also known as: undec-10-en-2-one, 10-undecen-2-one [fhfi].
Can 10-Undecen-2-one be labeled natural?
Since 10-Undecen-2-one is found in nature, US labeling follows how it was obtained: natural flavor from a natural source and a natural process, artificial when 10-Undecen-2-one is synthesized. The EU and UK grant the natural claim only to that natural route; Mercosur and Mexico call synthetic material identical-to-natural.
- United States
- Natural or artificial, by process
- European Union and UK
- Natural only from natural material
- Mercosur and Mexico
- Natural or identical-to-natural
How each market defines the classes: natural vs artificial flavor under 21 CFR 101.22.
Regulatory status, with citations
United States
10-Undecen-2-one is FEMA GRAS under FEMA number 4406. It is cited in the Code of Federal Regulations at 21 CFR 172.515.
European Union and United Kingdom
No EU FL number is on file for 10-Undecen-2-one. That is not a finding either way. The Union List covers defined flavouring substances, so natural complex materials are handled as flavouring preparations under Parts B to F and never receive a number, and substances used as additives sit under Regulation 1333/2008 instead. Confirm the position before EU or UK use.
JECFA (WHO / FAO)
JECFA number 1849.
Other US flags
Not on the California Proposition 65 list.
Odor and taste
Odor: Fruity, sweet, floral, green, waxy.
Where it is used
10-Undecen-2-one is used in beverage, confection, fruit flavors, bakery and ice cream, typically as a fruity note.
Structurally similar flavor ingredients
Flavor ingredients with a GRAS determination closest to 10-Undecen-2-one by structure. Whether one can replace it is a sensory and regulatory call; the reformulation tool works that through.
| Material | FEMA | Similarity | Occurrence |
|---|---|---|---|
| 9-Decen-2-one | 4706 | 98% | In nature |
| 9-Decenal | 3912 | 94% | In nature |
| 8-Nonen-2-one | 4408 | 94% | In nature |
| 10-Undecenal | 3095 | 94% | In nature |
| 1-Decen-3-ol | 3824 | 78% | In nature |
More ketones in this index
3,5-Dimethyl-1,2-cyclo-pentanedione · 3,5-Undecadien-2-one · 2-Pentadecanone · 2,3-Octanedione · 4-Hydroxyacetophenone · Dehydronootkatone
10-Undecen-2-one FAQ
Is 10-Undecen-2-one on the FEMA GRAS list?
It is. FEMA number 4406 covers 10-Undecen-2-one. It is also codified at 21 CFR 172.515.
What is the FEMA number for 10-Undecen-2-one?
The FEMA number for 10-Undecen-2-one is 4406 and its CAS registry number is 36219-73-5. FEMA files it in the fruity flavor category.
Is 10-Undecen-2-one natural or artificial?
10-Undecen-2-one occurs in nature, so the label depends on the route: 10-Undecen-2-one won from a natural source by a physical, enzymatic or microbiological process is natural flavor in the United States, and synthesized 10-Undecen-2-one is artificial. In the EU and UK the natural claim likewise needs the natural route, while Mercosur and Mexico keep a third class, identical-to-natural, for the synthetic material.
Is 10-Undecen-2-one approved in the EU?
No EU FL number is on file for 10-Undecen-2-one. It has a JECFA evaluation (JECFA 1849), which the EU list draws on, but the Union List entry itself should be confirmed before EU use.
Has JECFA evaluated 10-Undecen-2-one?
Yes. JECFA number 1849.
What is 10-Undecen-2-one used for?
10-Undecen-2-one is described as fruity, sweet, floral, green, waxy. It shows up in beverage, confection, fruit flavors, bakery and ice cream.
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Sources and attribution. The identity and regulatory facts on this page are taken from the FDA Substances Added to Food inventory, a US government record, which lists this substance as 10-UNDECEN-2-ONE under CAS 36219-73-5 and carries its FEMA number, its JECFA flavor number. The inventory is searchable at FDA. FDA records its technical effect as flavoring agent or adjuvant.
A FEMA GRAS conclusion is reached by the Expert Panel of the Flavor and Extract Manufacturers Association of the United States, and the FEMA number names that conclusion. FEMA publishes its own entry for this substance in the FEMA Flavor Library, which is the authoritative record of what the Panel decided and is worth reading alongside this page.
Ambrose Compliance is not affiliated with, endorsed by, or sponsored by FEMA. FEMA and FEMA GRAS are used here as identifiers for a published regulatory determination, not as marks of any relationship between FEMA and Ambrose.
About this page. Facts come from the FDA Substances Added to Food inventory, the Code of Federal Regulations, the EPA TSCA Inventory, the EU Union List, JECFA and the Ambrose database, with FEMA's published determination cited where it applies; parts of the text are written by Ambrose AI, which can make mistakes. Check the cited source before relying on anything here. This is not regulatory or legal advice.