(z,z)-9,12-octadecadienoic acid

sour acid

Found in 326 ingredients across the CompKitchen flavor graph.

Look up another compound — search by name, CAS number, PubChem CID, or FEMA #.

2D Lewis Structure

Formula: C18H32O2
Molecular weight: 280.4 g/mol
PubChem CID: 5280450 — full record on PubChem

Properties

Odor description: faint, fatty
Odor threshold — in a food matrix: 0.850 ppb – 66.0 ppb median 6.2 ppb · 6 published values · see all 6 with sources
Volatility: low
CAS number: 60-33-3
Retention index: 2142

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.

Published thresholds

6 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

0.850 ppb – 66.0 ppb

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

Threshold	Matrix	Source	Paper
0.850 ppb	water (food: strawberry)	Literature corpus	17898464, 19282638, 19320050 +27
3.3 ppb	water (food: beef)	Literature corpus	17898464, 19282638, 19320050 +27
5.5 ppb	water (food: tea)	Literature corpus	34179519, 39242718
7.0 ppb	water (food: unknown)	Literature corpus	19282638, 19320050, 23758650 +23
20.4 ppb	water (food: milk)	Literature corpus	21534545
66.0 ppb	water (food: chocolate)	Literature corpus	17898464

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 share

Every ingredient known to contain (z,z)-9,12-octadecadienoic 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 (z,z)-9,12-octadecadienoic acid in it.

18 cmpds

21 cmpds

23 cmpds

24 cmpds