trans,trans-2,4-heptadienal

green aldehyde

Found in 53 ingredients across the CompKitchen flavor graph.

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

2D Lewis Structure

Formula: C7H10O
Molecular weight: 110.15 g/mol
PubChem CID: 5283321 — full record on PubChem

Properties

Odor description: cinnamon, hazelnut
Odor threshold — retronasal / in-mouth: 30.0 ppb 1 published value · see all 2 with sources
Volatility: high
Retention index: 1011

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.

Also filed as

(e,e)-2,4-heptadienal e,e-2,4-heptadienal

Same molecule, unified here — previously counted and displayed as separate compounds.

Published thresholds

2 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.

Retronasal / in-mouth

30.0 ppb

Tasted rather than smelled — a different sense, not comparable.

Threshold	Matrix	Source	Paper
30.0 ppb SIDA	oil_retronasal	Rychlik 1998 · 1 studies	—

Other matrix

10000 ppb

Measured in a non-aqueous medium (oil, starch, cellulose).

Threshold	Matrix	Source	Paper
10000 ppb SIDA	oil_orthonasal	Rychlik 1998 · 1 studies	—

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 trans,trans-2,4-heptadienal. 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 trans,trans-2,4-heptadienal in it.

11 cmpds

19 cmpds

22 cmpds

44 cmpds