6-methyl-5-hepten-2-one

fruity ketone

Found in 418 ingredients across the CompKitchen flavor graph.

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

2D Lewis Structure

Formula: C8H14O
Molecular weight: 126.20 g/mol
PubChem CID: 9862 — full record on PubChem

Properties

Odor description: mushroom, rubber, oily
Odor threshold — in a food matrix: 1.2 ppb – 1330 ppb median 54.0 ppb · 7 published values · see all 8 with sources
Volatility: high
CAS number: 110-93-0
Retention index: 981

Regulatory · United States

FEMA GRAS — Generally Recognized As Safe for flavoring use

~ Likely match

FEMA number: 4400
GRAS publication: GRAS 23
FEMA primary name: 6-Methyl-5-hepten-2-one propyleneglycol acetal

Reported use levels (ppm by food category)

Typical vs maximum reported addition levels in finished food. Use as a regulatory ceiling reference — verify against the current GRAS publication for your product category.

Food category	Typical (ppm)	Maximum (ppm)
beverages (alcoholic)	0.1	2
beverages (nonalcoholic)	0.1	1
chewing gum	2	10
fruit ices	0.1	2
gelatins/ puddings	0.1	2
hard candy	0.5	3
soft candy	0.1	2

Source: FEMA GRAS publications 1-33.

How this molecule is described

Sources disagree about odour more often than they disagree about chemistry. Rather than show one answer, here is every description on file with how many ingredient records carry it.

Also filed as

6-methyl 5-hepten-2-one 6-methylhept-5-en-2-one

Same molecule, unified here — previously counted and displayed as separate compounds.

Descriptions on file

Ordered by how many independent descriptor streams give each wording, then by how often it appears. The bar is still replication — one source copied onto many ingredients scores high there — so the two can disagree.

mushroom, rubber, oily shown above Flavornet Cas, Flavornet Name, FlavorDB 2.0, Flavordb Odor Column 4 sources agree

apple, bitter, citrus, green, hazelnut, lemongrass, mushroom, musty, nutty, pepper, rubber FlavorDB 2.0

407

green, mushroom FlavorDB 2.0

ether FlavorDB 2.0

Bars are the share of ingredient records carrying each description. High agreement means the sources replicate each other — not necessarily that they are right.

Published thresholds

8 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

1.2 ppb – 1330 ppb

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

Threshold	Matrix	Source	Paper
0.070 ppb	water (food: fish)	Literature corpus	41183907
Flagged: 771× from the median of this group. Excluded from the range above pending re-check against the source publication — shown rather than hidden.
1.2 ppb	water (food: pepper)	Literature corpus	25372706, 41183907
50.0 ppb	water (food: litsea pungens fruit)	Literature corpus	25372706, 41183907
54.0 ppb	water (food: tea)	Literature corpus	25372706, 41183907
866 ppb	water (food: unknown)	Literature corpus	25372706
985 ppb	water (food: bread)	Literature corpus	25372706, 41183907
1330 ppb	water (food: beer)	Literature corpus	25372706, 41183907

In air

10.0 ppb

Airborne detection — not comparable to a water threshold.

Threshold	Matrix	Source	Paper
10.0 ppb	air (HS_hellman_small)	Cometto-Muñiz (PMC)	—

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.

Found in

Measured impact first, then profile share

Every ingredient known to contain 6-methyl-5-hepten-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 6-methyl-5-hepten-2-one in it.

16 cmpds

28 cmpds

28 cmpds

36 cmpds