1-octene-3-one

fruity ketone 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 (generalist)

Dunkel et al. 2014

Identified in the meta-analysis of 227 food samples as one of 16 generalist odorants — appears in >25% of foods, typically from generic Maillard, lipid-oxidation, or fermentation pathways. Characteristic odor: mushroom-like.

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

Properties

Odor description: sweet, fruity
Odor threshold — orthonasal, in clean water: 0.005 ppb 2 published values · see all 16 with sources
CAS number: 4312-99-6
Retention index: 979

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

16 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

0.005 ppb

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

Threshold	Matrix	Source	Paper
0.005 ppb	water_odor	Leffingwell	—
0.005 ppb SIDA	water	Rychlik 1998 · 1 studies	—

In a food matrix

0.005 ppb – 1.0 ppb

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

Threshold	Matrix	Source	Paper
0.005 ppb SIDA	water (food: smoked cooked loin (pork))	Literature corpus	31894982
0.007 ppb SIDA	water (food: longjing green tea infusion)	Literature corpus	31894982
0.016 ppb SIDA	water (food: green tea infusion (jingshan cha))	Literature corpus	31894982
0.016 ppb SIDA	water (food: reference standard (water))	Literature corpus	31894982
0.036 ppb SIDA	water (food: beef vegetable gravy)	Literature corpus	31894982
0.036 ppb SIDA	water (food: pork vegetable gravy)	Literature corpus	31894982
1.0 ppb SIDA	water (food: hand-squeezed grapefruit juice)	Literature corpus	31894982

Retronasal / in-mouth

0.010 ppb – 0.300 ppb

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

Threshold	Matrix	Source	Paper
0.010 ppb SIDA	water_retronasal	Rychlik 1998 · 1 studies	—
0.100 ppb	water_flavor	Leffingwell	—
0.300 ppb SIDA	oil_retronasal	Rychlik 1998 · 1 studies	—

Other matrix

2.0 ppb – 10.0 ppb

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

Threshold	Matrix	Source	Paper
0.044 ppb SIDA	starch	Rychlik 1998 · 1 studies	—
Flagged: 136× from the median of this group. Excluded from the range above pending re-check against the source publication — shown rather than hidden.
2.0 ppb SIDA	cellulose	Rychlik 1998 · 1 studies	—
10.0 ppb SIDA	oil_orthonasal	Rychlik 1998 · 1 studies	—
10.0 ppb SIDA	oil (sunflower oil) (food: cocoa beans)	Literature corpus	31894982

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	0.29 µg/L air	0.003–4	10	8	no (2.4 decades)
ethanol solution	1.27 ppb	0.04–2.5	2	2	yes
food matrix	0.05 ppb	0.003–61	24	20	no (4.0 decades)
oil	5.95 ppb	3–10	4	4	yes
unstated	0.03 ppb	0.003–10	53	42	no (2.4 decades)
water	0.016 ppb	0.003–10	29	29	no (3.1 decades)

Found in

Measured impact first, then profile share

Every ingredient known to contain 1-octene-3-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 1-octene-3-one in it.

72 cmpds

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