Flavor ingredient regulatory record
2,4-Dimethyl-5-acetylthiazole
2,4-Dimethyl-5-acetylthiazole is a thiazole in the savory family, FEMA GRAS under FEMA number 3267 (CAS 38205-60-6). Its odor is nutty, roasted, earthy, savory, meaty.
- FEMA
- 3267
- CAS
- 38205-60-6
- JECFA
- 1055
- EU FL
- 15.011
- Formula
- C7H9NOS
- EC
- 253-826-0
GRAS status: FEMA GRAS, publication 5. Recorded by FDA in the Substances Added to Food inventory under CAS 38205-60-6.
Structure
Identity
Also known as: Ethanone, 1-(2,4-dimethyl-5-thiazolyl)-, Ketone, 2,4-dimethyl-5-thiazolyl methyl, 1-(2,4-Dimethyl-5-thiazolyl)ethanone, 5-Acetyl-2,4-dimethylthiazole, 1-(2,4-Dimethylthiazol-5-yl)ethanone, 1-(2,4-Dimethyl-1,3-thiazol-5-yl)ethanone, 1-(2,4-Dimethylthiazol-5-yl)ethan-1-one, 1-(Dimethyl-1,3-thiazol-5-yl)ethan-1-one, 5-acetyl-2,4-dimethylthiazole, 1-(2,4-dimethylthiazol-5-yl)ethanone, ethanone, 1-(2,4-dimethyl-5-thiazolyl)-, nutty thiazole.
Can 2,4-Dimethyl-5-acetylthiazole be labeled natural?
The process decides for 2,4-Dimethyl-5-acetylthiazole. It occurs in nature, so a natural-source, natural-process material is natural flavor in the US and synthetic 2,4-Dimethyl-5-acetylthiazole 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
2,4-Dimethyl-5-acetylthiazole is FEMA GRAS under FEMA number 3267. 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 15.011, Annex I Part A under Regulation (EC) 1334/2008, evaluation status approved (EFSA). The UK retains the same list.
JECFA (WHO / FAO)
JECFA number 1055, evaluated at the 59th meeting in 2002. No safety concern at current levels of intake when used as a flavouring agent.
Other US flags
Not on the California Proposition 65 list.
Odor and taste
Odor: Nutty, roasted, earthy, savory, meaty.
Where it is used
2,4-Dimethyl-5-acetylthiazole is used in savory snacks, seasonings, meat products and sauces, typically as a savory note.
Structurally similar flavor ingredients
Flavor ingredients with a GRAS determination closest to 2,4-Dimethyl-5-acetylthiazole by structure. Whether one can replace it is a sensory and regulatory call; the reformulation tool works that through.
| Material | FEMA | Similarity | Occurrence |
|---|---|---|---|
| 2,4-Dimethyl-5-vinylthiazole | 3145 | 88% | In nature |
| 1-(3-Hydroxy-5-methyl-2-thienyl)ethanone | 4142 | 87% | Not determined |
| 2-Acetyl-5-methylthiophene | 4643 | 79% | In nature |
| 2,4,5-Trimethylthiazole | 3325 | 76% | In nature |
| 5-Ethyl-2-methylthiazole | 4388 | 75% | In nature |
More thiazoles in this index
4,5-Dimethyl-2-isobutylthiazole · 4-Methyl-5-vinylthiazole · 2-Pentylthiazole · 2-Propionylthiazole · 2-Ethyl-2,5-dihydro-4-methylthiazole · 2,4,5-Trimethylthiazole
2,4-Dimethyl-5-acetylthiazole FAQ
Is 2,4-Dimethyl-5-acetylthiazole FEMA GRAS?
Yes. The FEMA Expert Panel lists 2,4-Dimethyl-5-acetylthiazole as GRAS under FEMA number 3267. The Code of Federal Regulations lists it at 21 CFR 172.515.
What are the FEMA and CAS numbers for 2,4-Dimethyl-5-acetylthiazole?
2,4-Dimethyl-5-acetylthiazole is FEMA 3267, CAS 38205-60-6. Its flavor category is savory.
How is 2,4-Dimethyl-5-acetylthiazole described, and where does it show up?
Flavorists describe 2,4-Dimethyl-5-acetylthiazole as nutty, roasted, earthy, savory, meaty. It is used in savory snacks, seasonings, meat products and sauces.
What did JECFA conclude about 2,4-Dimethyl-5-acetylthiazole?
JECFA evaluated 2,4-Dimethyl-5-acetylthiazole at the 59th meeting in 2002 under JECFA number 1055. The panel concluded: No safety concern at current levels of intake when used as a flavouring agent.
Is 2,4-Dimethyl-5-acetylthiazole on the EU Union List?
Yes. FL 15.011 is the Union List entry for 2,4-Dimethyl-5-acetylthiazole, annex I Part A, under Regulation 1334/2008, and the UK keeps the same list.
Does 2,4-Dimethyl-5-acetylthiazole count as natural in the US and the EU?
Nature makes 2,4-Dimethyl-5-acetylthiazole, which is why the US label turns on process. A natural route gives natural flavor; synthesis gives artificial 2,4-Dimethyl-5-acetylthiazole, 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 2,4-DIMETHYL-5-ACETYLTHIAZOLE under CAS 38205-60-6 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.