trans-2-undecenal

Key food odorant

Found in 1 ingredient across the CompKitchen flavor graph.

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

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 threshold — orthonasal, in clean water: 340 ppb 1 published value · see all 4 with sources
CAS number: 2463-77-6

Regulatory · United States

FEMA GRAS — Generally Recognized As Safe for flavoring use

~ Isomer match

FEMA number: 3423
GRAS publication: GRAS 7
FEMA primary name: 2-UNDECENAL

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

Source: FEMA GRAS publications 1-33.

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

340 ppb

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

Threshold	Matrix	Source	Paper
340 ppb	water	PMC open access	—

In a food matrix

1.4 ppb

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

Threshold	Matrix	Source	Paper
1.4 ppb	water (food: beef vegetable gravy)	Literature corpus	10552650, 32165700, 34653803 +1
1.4 ppb	water (food: pork vegetable gravy)	Literature corpus	10552650, 32165700, 34653803 +1
1.4 ppb	water (food: reference standard (water))	Literature corpus	10552650, 32165700, 34653803 +1

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.

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?
air	0.99 µg/L air	0.01–1.4	6	3	no (2.1 decades)
food matrix	0.78 ppb	0.78–0.78	1	1	one paper
oil	1.5e+05 ppb	1.5e+05–1.5e+05	1	1	one paper
unstated	0.79 ppb	0.78–240	6	6	yes
water	0.78 ppb	0.041–1.4	11	11	yes

Found in

Measured impact first, then profile share

Every ingredient known to contain trans-2-undecenal. 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-undecenal in it.

venison

meat

29 cmpds

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