(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: 670000.0 ppb
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.

Thresholds in published tables

Numbers printed in open-access papers, grouped by the medium the table states. Median and full range of the values; “agree” means two or more papers whose middle 80% of values sit within 100×. Not reviewed.

Medium	Median	Range	Values	Papers	Papers agree?
water	1.31e+05 ppb	1.2e+03–2.61e+05	2	2	no (2.3 decades)

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