heptaldehyde

green aldehyde

Found in 2 ingredients across the CompKitchen flavor graph.

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

Properties

Odor threshold — orthonasal, in clean water: 3.0 ppb – 4.4 ppb median 3.7 ppb · 2 published values · see all 10 with sources
CAS number: 111-71-7
Retention index: 900

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.

Published thresholds

10 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

3.0 ppb – 4.4 ppb

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

Threshold	Matrix	Source	Paper
3.0 ppb	water_odor	Leffingwell	—
4.4 ppb SIDA	water	Rychlik 1998 · 2 studies	—

In a food matrix

3.0 ppb

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

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

Retronasal / in-mouth

21.0 ppb – 50.0 ppb

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

Threshold	Matrix	Source	Paper
21.0 ppb	water_flavor	Leffingwell	—
21.0 ppb SIDA	water_retronasal	Rychlik 1998 · 1 studies	—
50.0 ppb SIDA	oil_retronasal	Rychlik 1998 · 1 studies	—

In air

0.180 ppb

Airborne detection — not comparable to a water threshold.

Threshold	Matrix	Source	Paper
0.180 ppb	air	Nagata 2003	—

Other matrix

230 ppb – 1725 ppb

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

Threshold	Matrix	Source	Paper
230 ppb SIDA	meat_water	Rychlik 1998 · 1 studies	—
1725 ppb SIDA	oil_orthonasal	Rychlik 1998 · 2 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.

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	2.8 µg/L air	0.003–2.8e+03	34	26	no (2.2 decades)
ethanol solution	409.8 ppb	410–410	1	1	one paper
food matrix	3 ppb	0.0028–2.5e+07	86	78	yes
oil	50 ppb	50–500	5	3	yes
unstated	3 ppb	0.01–1.5e+07	134	118	yes
water	3 ppb	0.0009–550	97	93	yes

Found in

Measured impact first, then profile share

Every ingredient known to contain heptaldehyde. 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 heptaldehyde in it.

443 cmpds

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