Flavor ingredient regulatory record
beta-Ionone
beta-Ionone is a norisoprenoid in the fruity family, FEMA GRAS under FEMA number 2595 (CAS 79-77-6). Its odor is rose, honey, plum, tobacco, tea, powerful.
- FEMA
- 2595
- CAS
- 79-77-6
- JECFA
- 389
- EU FL
- 07.008
- Formula
- C13H20O
GRAS status: FEMA GRAS, publication 3. Recorded by FDA in the Substances Added to Food inventory under CAS 14901-07-6.
Structure
Identity
Also known as: 3-Buten-2-one, 4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-, (3E)-, 3-Buten-2-one, 4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-, (E)-, (3E)-4-(2,6,6-Trimethyl-1-cyclohexen-1-yl)-3-buten-2-one, trans-β-Ionone, β-Ionone, (E)-β-Ionone, Ionone beta, (E)-4-(2,6,6-Trimethyl-1-cyclohexen-1-yl)-3-buten-2-one, (E)-4-(2,6,6-Trimethylcyclohex-1-enyl)but-3-en-2-one, trans-β-Lonone, (e)-beta-ionone, trans-beta-ionone.
Can beta-Ionone be labeled natural?
The process decides for beta-Ionone. It occurs in nature, so a natural-source, natural-process material is natural flavor in the US and synthetic beta-Ionone is artificial. 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
beta-Ionone is FEMA GRAS under FEMA number 2595. 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 07.008, Annex I Part A under Regulation (EC) 1334/2008, evaluation status approved (JECFA/EFSA). The UK retains the same list.
JECFA (WHO / FAO)
JECFA number 389, evaluated at the 51st meeting in 1998. ADI 0 to 0.1 mg/kg body weight.
Other US flags
Not on the California Proposition 65 list.
TSCA Inventory status
A flavor ingredient is also an industrial chemical. beta-Ionone appears on the EPA Toxic Substances Control Act Chemical Substance Inventory under CAS 79-77-6, where EPA names it 3-Buten-2-one, 4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-, (3E)-.
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: Rose, honey, plum, tobacco, tea, powerful.
Taste: Fruity, tea-like, honey, apple.
Where it is used
beta-Ionone is used in apple, tea, rose, honey and wine, typically as a fruity note.
Structurally similar flavor ingredients
Flavor ingredients with a GRAS determination closest to beta-Ionone by structure. Whether one can replace it is a sensory and regulatory call; the reformulation tool works that through.
| Material | FEMA | Similarity | Occurrence |
|---|---|---|---|
| alpha-Ionone | 2594 | 98% | In nature |
| Dehydrodihydroionone | 3447 | 98% | In nature |
| Dihydro-alpha-ionone | 3628 | 96% | In nature |
| Dihydro-beta-ionone | 3626 | 94% | In nature |
| Ionone | 3175 | 91% | In nature |
beta-Ionone FAQ
Is beta-Ionone FEMA GRAS?
Yes. The FEMA Expert Panel lists beta-Ionone as GRAS under FEMA number 2595. The Code of Federal Regulations lists it at 21 CFR 172.515.
What are the FEMA and CAS numbers for beta-Ionone?
beta-Ionone is FEMA 2595, CAS 79-77-6. Its flavor category is fruity.
How is beta-Ionone described, and where does it show up?
Flavorists describe beta-Ionone as rose, honey, plum, tobacco, tea, powerful. On the palate it is fruity, tea-like, honey, apple. It is used in apple, tea, rose, honey and wine.
What did JECFA conclude about beta-Ionone?
JECFA evaluated beta-Ionone at the 51st meeting in 1998 under JECFA number 389.
Is beta-Ionone on the EU Union List?
Yes. FL 07.008 is the Union List entry for beta-Ionone, annex I Part A, under Regulation 1334/2008, and the UK keeps the same list.
Does beta-Ionone count as natural in the US and the EU?
Nature makes beta-Ionone, which is why the US label turns on process. A natural route gives natural flavor; synthesis gives artificial beta-Ionone, same molecule. 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.
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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 BETA-IONONE under CAS 14901-07-6 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.