undecadien-2-one
Found in 2 ingredients across the CompKitchen flavor graph.
Look up another compound — search by name, CAS number, PubChem CID, or FEMA #.
Properties
- Odor description
- fatty, green, fruity
- Odor threshold — orthonasal, in clean water
- 0.440 ppb – 6.0 ppb median 3.2 ppb · 2 published values · see all 5 with sources
- CAS number
- 91-20-3
FEMA GRAS — Generally Recognized As Safe for flavoring use
- FEMA number
- 4746
- GRAS publication
- GRAS 26
- FEMA primary name
- 3,5-undecadien-2-one
Reported use levels (ppm by food category)
Typical vs maximum reported addition levels in finished food. Use as a regulatory ceiling reference — verify against the current GRAS publication for your product category.
| Food category | Typical (ppm) | Maximum (ppm) |
|---|---|---|
| beverages, nonalcoholic | 1 | 10 |
| chewing gum | 10 | 30 |
| confections and frostings | 1 | 10 |
| fats and oils | 1 | 10 |
| fruit ices | 1 | 10 |
| gelatins and puddings | 1 | 10 |
| gravies | 1 | 10 |
| hard candy | 5 | 20 |
| jams and jellies | 1 | 10 |
| seasonings and flavors | 1 | 10 |
| snack foods | 5 | 25 |
| soft candy | 1 | 10 |
| soups | 1 | 10 |
| sweet sauces | 1 | 10 |
How this molecule is described
Sources disagree about odour more often than they disagree about chemistry. Rather than show one answer, here is every description on file with how many ingredient records carry it.
Ordered by how many independent descriptor streams give each wording, then by how often it appears. The bar is still replication — one source copied onto many ingredients scores high there — so the two can disagree.
Bars are the share of ingredient records carrying each description. High agreement means the sources replicate each other — not necessarily that they are right.
Published thresholds
5 measured values from the literature. Grouped by what was actually measured — a threshold smelled in clean water, tasted in the mouth, or measured in a real food are three different quantities and are not pooled.
Orthonasal, in clean water
0.440 ppb – 6.0 ppbThe reference measurement — smelled in water. OAV is computed against this.
| Threshold | Matrix | Source | Paper |
|---|---|---|---|
| 0.440 ppb | water | PMC open access | — |
| 6.0 ppb | water | PMC open access | — |
In water, medium unconfirmed
1.0 ppb – 60.0 ppbReported as water, but the medium could not be confirmed from the source — not used for OAV.
| Threshold | Matrix | Source | Paper |
|---|---|---|---|
| 1.0 ppb | water (unverified; relabelled from air, audit 2026-10-14) | PMC open access | — |
| 60.0 ppb | water (unverified; relabelled from air, audit 2026-10-14) | PMC open access | — |
Other matrix
6.0 ppbMeasured in a non-aqueous medium (oil, starch, cellulose).
| Threshold | Matrix | Source | Paper |
|---|---|---|---|
| 6.0 ppb | unknown | PMC open access | — |
Only values we can attribute are listed. Where a compendium's licence does not permit public attribution its figures are omitted here, so every number on this page traces to a citable source.
Found in
Measured impact first, then profile shareEvery ingredient known to contain undecadien-2-one. Ingredients with a measured concentration come first, ranked by odour activity; the rest follow by how large a share of that ingredient's profile this molecule is. The figure beside each is how many different compounds that ingredient has in total — not the concentration of undecadien-2-one in it.
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