Flavor ingredient regulatory record
5-Ethyl-2-methylthiazole
5-Ethyl-2-methylthiazole is a thiazole in the savory family, FEMA GRAS under FEMA number 4388 (CAS 19961-52-5). Its odor is nutty, roasted, meaty, sulfurous.
- FEMA
- 4388
- CAS
- 19961-52-5
- JECFA
- 2113
- EU FL
- 15.068
- Formula
- C6H9NS
GRAS status: FEMA GRAS, publication 23. Recorded by FDA in the Substances Added to Food inventory under CAS 19961-52-5.
Structure
Identity
Also known as: Thiazole, 5-ethyl-2-methyl-, 2-Methyl-5-ethylthiazole, 5-Ethyl-2-methyl-1,3-thiazole, 5-ethyl-2-methyl-1,3-thiazole, 2-methyl-5-ethylthiazole, thiazole, 5-ethyl-2-methyl-, 5-ethyl-2-methylthiazole [fifh], 5-ethyl-2-methylthiazole [fhfi], 5-ethyl-2-methylthiazole (fifh), 5-ethyl-2-methyl thiazole, db-219480.
Can 5-Ethyl-2-methylthiazole be labeled natural?
5-Ethyl-2-methylthiazole occurs in nature, so the label depends on the route: 5-Ethyl-2-methylthiazole won from a natural source by a physical, enzymatic or microbiological process is natural flavor in the United States, and synthesized 5-Ethyl-2-methylthiazole is artificial. The EU and UK follow the same logic without a middle class; Mercosur and Mexico label synthetic 5-Ethyl-2-methylthiazole 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
5-Ethyl-2-methylthiazole is FEMA GRAS under FEMA number 4388. 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 15.068, Annex I Part A under Regulation (EC) 1334/2008, evaluation status approved (EFSA). The UK retains the same list.
Other US flags
Not on the California Proposition 65 list.
Odor and taste
Odor: Nutty, roasted, meaty, sulfurous.
Where it is used
5-Ethyl-2-methylthiazole 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 5-Ethyl-2-methylthiazole by structure. Whether one can replace it is a sensory and regulatory call; the reformulation tool works that through.
| Material | FEMA | Similarity | Occurrence |
|---|---|---|---|
| 2-Methyl-5-methoxythiazole | 3192 | 88% | In nature |
| 2-Acetyl-5-methylthiophene | 4643 | 80% | In nature |
| 2,4,5-Trimethylthiazole | 3325 | 80% | In nature |
| 2,4-Dimethyl-5-vinylthiazole | 3145 | 80% | In nature |
More thiazoles in this index
4,5-Dimethyl-2-isobutylthiazole · 2-Acetylthiazole · 2,4,5-Trimethylthiazole · 2-Ethyl-2,5-dihydro-4-methylthiazole · 2,4-Dimethyl-5-vinylthiazole · 2-Isobutylthiazole
5-Ethyl-2-methylthiazole FAQ
Is 5-Ethyl-2-methylthiazole on the FEMA GRAS list?
It is. FEMA number 4388 covers 5-Ethyl-2-methylthiazole. It is also codified at 21 CFR 172.515.
What is the FEMA number for 5-Ethyl-2-methylthiazole?
The FEMA number for 5-Ethyl-2-methylthiazole is 4388 and its CAS registry number is 19961-52-5. FEMA files it in the savory flavor category.
Is 5-Ethyl-2-methylthiazole natural or artificial?
Since 5-Ethyl-2-methylthiazole is found in nature, US labeling follows how it was obtained: natural flavor from a natural source and a natural process, artificial when 5-Ethyl-2-methylthiazole is synthesized. The EU and UK follow the same logic without a middle class; Mercosur and Mexico label synthetic 5-Ethyl-2-methylthiazole identical-to-natural.
Is 5-Ethyl-2-methylthiazole approved in the EU?
5-Ethyl-2-methylthiazole is on the EU Union List of flavouring substances as FL 15.068 (Annex I Part A) under Regulation 1334/2008.
Has JECFA evaluated 5-Ethyl-2-methylthiazole?
Yes. JECFA number 2113. Conclusion: no safety concern at current levels of intake.
What is 5-Ethyl-2-methylthiazole used for?
5-Ethyl-2-methylthiazole is described as nutty, roasted, meaty, sulfurous. It shows up in savory snacks, seasonings, meat products and sauces.
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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 5-ETHYL-2-METHYLTHIAZOLE under CAS 19961-52-5 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.