Flavor ingredient regulatory record
10-Undecenal
10-Undecenal is an aldehyde in the fruity family, FEMA GRAS under FEMA number 3095 (CAS 112-45-8). Its odor is fatty, green, waxy, citrus, fruity.
- FEMA
- 3095
- CAS
- 112-45-8
- JECFA
- 330
- EU FL
- 05.035
- Formula
- C11H20O
- EC
- 203-973-1
GRAS status: FEMA GRAS, publication 3. Recorded by FDA in the Substances Added to Food inventory under CAS 112-45-8.
Structure
Identity
Also known as: 10-Hendecenal, Undecylenic aldehyde, Undecylene aldehyde, 10-Undecen-1-al, ω-Undecenyl aldehyde, NSC 44900, Intreleven aldehyde, 10-Undecylenic aldehyde, 10-Undecenyl aldehyde, Aldehyde C 111LEN, Undec-10-enal, undec-10-enal.
Can 10-Undecenal be labeled natural?
The process decides for 10-Undecenal. It occurs in nature, so a natural-source, natural-process material is natural flavor in the US and synthetic 10-Undecenal is artificial. The EU and UK follow the same logic without a middle class; Mercosur and Mexico label synthetic 10-Undecenal 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-Undecenal is FEMA GRAS under FEMA number 3095. It is cited in the Code of Federal Regulations at 21 CFR 172.515.
European Union and United Kingdom
Listed on the Union List of flavouring substances as FL 05.035, Annex I Part A under Regulation (EC) 1334/2008, evaluation status approved (JECFA). The UK retains the same list.
JECFA (WHO / FAO)
JECFA number 330, evaluated at the 51st meeting in 1998. no safety concern at current levels of intake.
Other US flags
Not on the California Proposition 65 list.
TSCA Inventory status
A flavor ingredient is also an industrial chemical. 10-Undecenal appears on the EPA Toxic Substances Control Act Chemical Substance Inventory under CAS 112-45-8, where EPA names it 10-Undecenal.
Active in US commerce
EPA designates this substance active, so no Notice of Activity Form B is required before manufacturing. What active and inactive mean.
EPA publishes no regulatory flags on this listing. What the flags mean.
From the EPA non-confidential TSCA Inventory, July 2026 release. EPA also maintains a confidential portion it does not publish. Search the Inventory by CAS number.
Odor and taste
Odor: Fatty, green, waxy, citrus, fruity.
Taste: Fatty, slightly sweet, green.
Where it is used
10-Undecenal is used in beverage, confection, fruit flavors, savory dishes and snacks, typically as a fruity note.
Structurally similar flavor ingredients
Flavor ingredients with a GRAS determination closest to 10-Undecenal by structure. Whether one can replace it is a sensory and regulatory call; the reformulation tool works that through.
| Material | FEMA | Similarity | Occurrence |
|---|---|---|---|
| 9-Decenal | 3912 | 98% | In nature |
| 10-Undecen-2-one | 4406 | 94% | In nature |
| 9-Decen-2-one | 4706 | 92% | In nature |
| 9-Undecenal | 3094 | 85% | In nature |
| Undec-2(trans)-enal | 3423 | 83% | In nature |
More aldehydes in this index
9-Undecenal · 2,3-Epoxyheptanal · 4,7-Decadienal · Nonanal · Nona-2,4,6-trienal · 2-(Methylthiomethyl)-3-phenylpropenal
10-Undecenal FAQ
Is 10-Undecenal on the FEMA GRAS list?
It is. FEMA number 3095 covers 10-Undecenal. The Code of Federal Regulations lists it at 21 CFR 172.515.
What is the FEMA number for 10-Undecenal?
The FEMA number for 10-Undecenal is 3095 and its CAS registry number is 112-45-8. Its flavor category is fruity.
What is 10-Undecenal used for?
10-Undecenal is described as fatty, green, waxy, citrus, fruity. On the palate it is fatty, slightly sweet, green. It shows up in beverage, confection, fruit flavors, savory dishes and snacks.
What did JECFA conclude about 10-Undecenal?
JECFA evaluated 10-Undecenal at the 51st meeting in 1998 under JECFA number 330. The panel concluded: no safety concern at current levels of intake.
Is 10-Undecenal approved in the EU?
Yes. FL 05.035 is the Union List entry for 10-Undecenal, annex I Part A, under Regulation 1334/2008, and the UK keeps the same list.
Is 10-Undecenal natural or artificial?
Nature makes 10-Undecenal, which is why the US label turns on process. A natural route gives natural flavor; synthesis gives artificial 10-Undecenal, same molecule. The EU and UK grant the natural claim only to that natural route; Mercosur and Mexico call synthetic material identical-to-natural.
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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-UNDECENAL under CAS 112-45-8 and carries its FEMA number, its JECFA flavor number and its 21 CFR citations. 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.