2,4-Undecadienal
2,4-Undecadienal; a fatty-smelling flavor aldehyde with a fried-food character.
No policy
No HigherBar policy on this ingredient.
Approved in 2 of 7 tracked registries, under review in 1, no published record in 4.
2,4-Undecadienal is an unsaturated aldehyde that forms naturally when fats oxidize, giving fried foods like potato chips and fried chicken their characteristic aroma. Flavor makers add small amounts of the synthesized compound to recreate that fried, fatty note in snack and savory products.
What each registry publishes about 2,4-undecadienal.
Every row comes from a published regulator source, linked so you can read it yourself. "Prohibited" means a regulator has affirmatively banned it; "not authorized" means it has never been cleared for that use there. The two are not the same thing, so we never collapse them.
Approved in 2 of 7 tracked registries, under review in 1, no published record in 4. Last verified Oct 1, 2026.
| Registry | Status | Published record |
|---|---|---|
| United States (FDA) | Approvedgras | Technical effect: FLAVORING AGENT OR ADJUVANT |
| European Union (EFSA) | Approvedflavor | |
| United Kingdom (FSA) | Under reviewflavor | This is a flavouring substance under evaluation/footnote flavouring. It is permitted for use, but the evaluation process has not been completed. |
| Codex Alimentarius (JECFA) | No published data | Our sources hold no evidenced record here. That is not a clearance and not a ban. |
| Japan (CAA) | No published data | Our sources hold no evidenced record here. That is not a clearance and not a ban. |
| Australia & New Zealand (FSANZ) | No published data | Our sources hold no evidenced record here. That is not a clearance and not a ban. |
| Canada (Health Canada) | No published data | Our sources hold no evidenced record here. That is not a clearance and not a ban. |
We publish only evidenced regulatory rows, each with its source. Coverage is uneven across registries, and a missing row is reported as missing.
Check a whole label, not just one ingredient.
Paste a product's full ingredient list and get this same record for every ingredient we can identify, plus an honest "not recognized" for the rest.