methylheptan-2-one

Found in 3 ingredients across the CompKitchen flavor graph.

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

Properties

Odor description: green
Odor threshold — orthonasal, in clean water: 29.0 ppb – 1570 ppb median 800 ppb · 2 published values · see all 11 with sources
CAS number: 110-43-0

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

11 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

29.0 ppb – 1570 ppb

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

Threshold	Matrix	Source	Paper
29.0 ppb SIDA	water	Rychlik 1998 · 3 studies	—
1570 ppb	water_odor	Leffingwell	—

In a food matrix

1.0 ppb – 514 ppb

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

Threshold	Matrix	Source	Paper
1.0 ppb	water (food: goat milk)	Literature corpus	—
6.0 ppb	water (food: fish)	Literature corpus	—
160 ppb	water (food: wine)	Literature corpus	—
514 ppb	water (food: unknown)	Literature corpus	—

Retronasal / in-mouth

1000 ppb – 1500 ppb

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

Threshold	Matrix	Source	Paper
1000 ppb	water_flavor	Leffingwell	—
1500 ppb SIDA	oil_retronasal	Rychlik 1998 · 1 studies	—

In air

4.8 ppb – 6.8 ppb

Airborne detection — not comparable to a water threshold.

Threshold	Matrix	Source	Paper
4.8 ppb	air (C2_cometto_muniz_abraham)	Cometto-Muñiz (PMC)	—
6.8 ppb	air	Nagata 2003	—

Other matrix

1500 ppb

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

Threshold	Matrix	Source	Paper
1500 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.

Where you'd actually smell it

Odor Activity Value = measured concentration ÷ odor threshold (94.5 ppb, the engine's canonical value — see the 11 published values). OAV ≥ 1 = perceptible.

Food	Concentration (ppb)	OAV	Source
veal	1560.0	16.5 ⚡	PMID 37794314

Concentrations from PubMed Central Open Access papers (free literature corpus, MIT-style licensed). Copper = OAV ≥ 10 (strongly perceptible). Green = OAV ≥ 1 (perceptible).

Found in

Measured impact first, then profile share

Every ingredient known to contain methylheptan-2-one. 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 methylheptan-2-one in it. Full concentrations are in the OAV table above.

407 cmpds

128 cmpds

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