2-decenal
green aldehydeFound in 51 ingredients across the CompKitchen flavor graph.
Look up another compound — search by name, CAS number, PubChem CID, or FEMA #.
- Formula
- C10H18O
- Molecular weight
- 154.25 g/mol
- PubChem CID
- 5283345 — full record on PubChem
Properties
- Odor description
- fatty, fried, tallow, orange peel, green
- Odor threshold — orthonasal, in clean water
- 0.350 ppb – 5.2 ppb median 2.8 ppb · 2 published values · see all 13 with sources
- Volatility
- medium
- CAS number
- 3913-71-1
- Retention index
- 1262
FEMA GRAS — Generally Recognized As Safe for flavoring use
- FEMA number
- 2366
- GRAS publication
- GRAS 3
- FEMA primary name
- 2-DECENAL-Decenaldehyde
Use-level matrix not extracted for this substance — check the source publication for current ppm guidance.
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
13 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
0.350 ppb – 5.2 ppbThe reference measurement — smelled in water. OAV is computed against this.
| Threshold | Matrix | Source | Paper |
|---|---|---|---|
| 0.350 ppb | water_odor | Leffingwell | — |
| 5.2 ppb | water/ethanol 6:4 (food: american bourbon whisky) | Literature corpus | — |
In a food matrix
0.270 ppb – 96.0 ppbMeasured in a real food, where the matrix shifts detection — not a clean-water value.
| Threshold | Matrix | Source | Paper |
|---|---|---|---|
| 0.270 ppb | water (food: reference standard (water)) | Literature corpus | — |
| 0.385 ppb | water (food: peach) | Literature corpus | — |
| 0.400 ppb | water (food: beef vegetable gravy) | Literature corpus | — |
| 0.400 ppb | water (food: pork vegetable gravy) | Literature corpus | — |
| 2.2 ppb | water (food: tea) | Literature corpus | — |
| 13.0 ppb | water (food: chocolate) | Literature corpus | — |
| 37.0 ppb | water (food: fish) | Literature corpus | — |
| 96.0 ppb | water (food: unknown) | Literature corpus | — |
| 821 ppb | water (food: rum) | Literature corpus | — |
| Flagged: 108× from the median of this group. Excluded from the range above pending re-check against the source publication — shown rather than hidden. | |||
| 1271 ppb | water (food: ginger) | Literature corpus | — |
| Flagged: 168× from the median of this group. Excluded from the range above pending re-check against the source publication — shown rather than hidden. | |||
Retronasal / in-mouth
230 ppbTasted rather than smelled — a different sense, not comparable.
| Threshold | Matrix | Source | Paper |
|---|---|---|---|
| 230 ppb | water_flavor | Leffingwell | — |
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.
Where you'd actually smell it
Odor Activity Value = measured concentration ÷ odor threshold (2.17 ppb, the engine's canonical value — see the 13 published values). OAV ≥ 1 = perceptible.
| Food | Concentration (ppb) | OAV | Source |
|---|---|---|---|
| olive oil | 40000.0 | 18433 ⚡ | — |
| olive | 40000.0 | 18433 ⚡ | — |
| peach | 539.3 | 249 ⚡ | Corpus paper |
| bread | 400.0 | 184 ⚡ | PMID 38840722 |
| beef | 323.0 | 149 ⚡ | Corpus paper |
| french fry | 180.0 | 83.0 ⚡ | Corpus paper |
| ginger | 31.4 | 14.5 ⚡ | Corpus paper |
| fish | 7.0 | 3.23 | Corpus paper |
| tea | 1.2 | 0.56 | Corpus paper |
| chocolate | 0.4 | 0.18 | Corpus paper |
| rum | 0.0 | 0.01 | Corpus paper |
| rice | 0.0 | 0.00 | — |
| coffee | 0.0 | 0.00 | — |
| mushroom | 0.0 | 0.00 | — |
Concentrations from PubMed Central Open Access papers (free literature corpus, MIT-style licensed). Copper = OAV ≥ 10 (strongly perceptible). Green = OAV ≥ 1 (perceptible).
Found in
Measured impact first, then profile shareEvery ingredient known to contain 2-decenal. 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 2-decenal in it. Full concentrations are in the OAV table above.
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