alpha-thujone

fruity ketone

Found in 17 ingredients across the CompKitchen flavor graph.

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

Properties

Odor description: bitter, cedarleaf
Odor threshold — in a food matrix: 0.250 ppb – 74.0 ppb median 1.5 ppb · 5 published values · see all 5 with sources
CAS number: 546-80-5

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

5 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

0.250 ppb – 74.0 ppb

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

Threshold	Matrix	Source	Paper
0.250 ppb	water (food: tea)	Literature corpus	—
0.970 ppb	water (food: milk)	Literature corpus	—
1.5 ppb	water (food: unknown)	Literature corpus	—
9.8 ppb	water (food: tomato)	Literature corpus	—
74.0 ppb	water (food: mango)	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.

Where you'd actually smell it

Odor Activity Value = measured concentration ÷ odor threshold (1.5 ppb, the engine's canonical value — see the 5 published values). OAV ≥ 1 = perceptible.

Food	Concentration (ppb)	OAV	Source
tea	1101.0	734 ⚡	—
tomato	18.5	12.3 ⚡	—
milk	8.4	5.60	—
mango	0.0	0.03	—

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 alpha-thujone. 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 alpha-thujone in it. Full concentrations are in the OAV table above.

136 cmpds

164 cmpds

212 cmpds

233 cmpds