octadecatrienoic acid

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, waxy, faint
Odor threshold — orthonasal, in clean water: 10000 ppb 1 published value · see all 22 with sources
CAS number: 57-10-3

Not in FEMA GRAS publications 1-33. Of 3,367 listed flavoring substances, none match this compound name. May still be food-safe under other regulatory routes (FDA 21 CFR 172, EFSA, JECFA) — check femaflavor.org for the authoritative current list.

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.

Descriptions on file

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.

fatty FlavorDB 2.0, Flavordb Odor Column 2 sources agree

eucalyptus, chemical FlavorDB 2.0, Flavordb Odor Column 2 sources agree

fatty, waxy, faint shown above Llm Adjudicated

—

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

22 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

10000 ppb

The reference measurement — smelled in water. OAV is computed against this.

Threshold	Matrix	Source	Paper
10000 ppb	water_odor	Leffingwell	—

In a food matrix

0.450 ppb – 121 ppb

Measured in a real food, where the matrix shifts detection — not a clean-water value.

Threshold	Matrix	Source	Paper
0.450 ppb	water (food: onion)	Literature corpus	41174015
0.790 ppb	water (food: honey)	Literature corpus	17912357, 41306594
0.850 ppb	water (food: strawberry)	Literature corpus	17898464, 17912357, 19282638 +42
3.5 ppb	water (food: ginger)	Literature corpus	41193520
4.4 ppb	water (food: rum)	Literature corpus	17898464, 17912357, 19282638 +42
5.8 ppb	water (food: tea)	Literature corpus	34179519, 36323840, 39242718
7.5 ppb	water (food: mushroom)	Literature corpus	17898464, 17912357, 19282638 +42
8.0 ppb	water (food: chocolate)	Literature corpus	17898464
8.0 ppb	water (food: fish)	Literature corpus	17898464, 17912357, 19282638 +42
8.7 ppb	water (food: apple)	Literature corpus	17898464, 17912357, 19282638 +42
8.8 ppb	water (food: grape)	Literature corpus	39961895
12.7 ppb	water (food: unknown)	Literature corpus	19282638, 22391602, 23285821 +29
18.9 ppb	water (food: milk)	Literature corpus	21534545
23.9 ppb	water (food: pork)	Literature corpus	17898464, 17912357, 19282638 +42
32.2 ppb	water (food: baijiu)	Literature corpus	35513386
35.6 ppb	water (food: beer)	Literature corpus	17898464, 17912357, 19282638 +42
43.0 ppb	water (food: soy sauce)	Literature corpus	17898464, 17912357, 19282638 +42
121 ppb	water (food: mango)	Literature corpus	29211747
1963 ppb	water (food: beef)	Literature corpus	17898464, 17912357, 19282638 +42
Flagged: 222× from the median of this group. Excluded from the range above pending re-check against the source publication — shown rather than hidden.
1977 ppb	water (food: rice)	Literature corpus	17898464, 17912357, 19282638 +42
Flagged: 224× from the median of this group. Excluded from the range above pending re-check against the source publication — shown rather than hidden.
3520 ppb	water (food: peanut)	Literature corpus	39512543
Flagged: 399× 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.

Where you'd actually smell it

Odor Activity Value = measured concentration ÷ odor threshold (10.7515 ppb, the engine's canonical value — see the 22 published values). OAV ≥ 1 = perceptible.

Food	Concentration (ppb)	OAV	Source
shrimp	574000.0	53388 ⚡	PMID 39280287
papaya	200000.0	18602 ⚡	PMID 38798837

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 share

Every ingredient known to contain octadecatrienoic 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 octadecatrienoic acid in it. Full concentrations are in the OAV table above.

128 cmpds

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