9-octadecenoic acid
dairy acidFound in 6 ingredients across the CompKitchen flavor graph.
Look up another compound — search by name, CAS number, PubChem CID, or FEMA #.
- Formula
- C18H34O2
- Molecular weight
- 282.5 g/mol
- PubChem CID
- 965 — full record on PubChem
Properties
- Odor description
- fatty, waxy, faint oily
- Odor threshold — in a food matrix
- 0.280 ppb – 697 ppb median 8.8 ppb · 11 published values · see all 11 with sources
- Volatility
- low
- CAS number
- 112-80-1
- Retention index
- 2065
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
11 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.
In a food matrix
0.280 ppb – 697 ppbMeasured in a real food, where the matrix shifts detection — not a clean-water value.
| Threshold | Matrix | Source | Paper |
|---|---|---|---|
| 0.040 ppb | water (food: rum) | Literature corpus | 34652538 |
| Flagged: 221× from the median of this group. Excluded from the range above pending re-check against the source publication — shown rather than hidden. | |||
| 0.280 ppb | water (food: beef) | Literature corpus | 21534545, 23326358, 26368045 +32 |
| 0.686 ppb | water (food: honey) | Literature corpus | 41306594 |
| 1.9 ppb | water (food: mushroom) | Literature corpus | 40855247 |
| 3.4 ppb | water (food: tea) | Literature corpus | 34179519, 39242718 |
| 8.8 ppb | water (food: unknown) | Literature corpus | 23326358, 26368045, 28963525 +19 |
| 20.5 ppb | water (food: milk) | Literature corpus | 21534545 |
| 27.6 ppb | water (food: fish) | Literature corpus | 36950329 |
| 79.9 ppb | water (food: rice) | Literature corpus | 35762564, 40284053, 40468875 +1 |
| 697 ppb | water (food: tomato) | Literature corpus | 38253713 |
| 4070 ppb | water (food: peanut) | Literature corpus | 39512543 |
| Flagged: 461× from the median of this group. Excluded from the range above pending re-check against the source publication — shown rather than hidden. | |||
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 9-octadecenoic acid. 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 9-octadecenoic acid in it.
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