cis-2-hexenal

green aldehyde Key food odorant

Found in 2 ingredients 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. Characteristic odor: green, apple-like.

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

Properties

Odor description: grassy
Odor threshold — in a food matrix: 17.0 ppb – 190 ppb median 104 ppb · 2 published values · see all 2 with sources
CAS number: 505-57-7

Regulatory · United States

FEMA GRAS — Generally Recognized As Safe for flavoring use

~ Isomer match

FEMA number: 2560
GRAS publication: GRAS 3
FEMA primary name: 2-HEXENAL

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

Source: FEMA GRAS publications 1-33.

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.

In a food matrix

17.0 ppb – 190 ppb

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

Threshold	Matrix	Source	Paper
17.0 ppb	water (food: goat milk)	Literature corpus	—
190 ppb	water (food: reference standard (water))	Literature corpus	—

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	40 µg/L air	40–40	1	1	one paper

Found in

Measured impact first, then profile share

Every ingredient known to contain cis-2-hexenal. 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 cis-2-hexenal in it.

370 cmpds

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