trans-2-decenal

green aldehyde Key food odorant

Found in 35 ingredients across the CompKitchen flavor graph.

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

2D Lewis Structure

Formula: C10H18O
Molecular weight: 154.25 g/mol
PubChem CID: 5283345 — full record on PubChem

Key food odorant (individualist)

Dunkel et al. 2014

Identified in the meta-analysis of 227 food samples as one of 151 individualist odorants — appears in <5% of foods, carries the diagnostic signature of specific ingredients.

Source: Angew. Chem. Int. Ed. 2014, 53, 7124–7143

Properties

Odor description: waxy, orange, fatty
Odor threshold — orthonasal, in clean water: 0.350 ppb 1 published value · see all 4 with sources
Volatility: medium
CAS number: 3913-81-3

Regulatory · United States

FEMA GRAS — Generally Recognized As Safe for flavoring use

~ Likely match

FEMA number: 2366
GRAS publication: GRAS 3
FEMA primary name: 2-DECENAL-Decenaldehyde

Use-level matrix not extracted for this substance — check the source publication for current ppm guidance.

Source: FEMA GRAS publications 1-33.

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)-2-decenal e-2-decenal

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

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.

waxy, orange, fatty shown above Flavornet Cas, Flavornet Name, FlavorDB 2.0, Flavordb Odor Column 4 sources agree

aldehydic, coriander, earthy, fatty, floral, green, mushroom, oily, orange, rose, tallow, waxy FlavorDB 2.0

fruity, sweet, fatty, waxy, chemical, pine, rancid FlavorDB 2.0

sweet FlavorDB 2.0

floral and fruity FlavorDB 2.0

rancid, fatty Flavordb Odor Column

—

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

4 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

0.350 ppb

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

Threshold	Matrix	Source	Paper
0.350 ppb SIDA	water	Rychlik 1998 · 2 studies	—

Retronasal / in-mouth

150 ppb – 230 ppb

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

Threshold	Matrix	Source	Paper
150 ppb SIDA	oil_retronasal	Rychlik 1998 · 1 studies	—
230 ppb SIDA	water_retronasal	Rychlik 1998 · 1 studies	—

Other matrix

33800 ppb

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

Threshold	Matrix	Source	Paper
33800 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-2-decenal. 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-2-decenal in it.

48 cmpds

59 cmpds

66 cmpds

68 cmpds