5-nonanone

fruity ketone

Found in 3 ingredients across the CompKitchen flavor graph.

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

2D Lewis Structure

Formula: C9H18O
Molecular weight: 142.24 g/mol
PubChem CID: 10405 — full record on PubChem

Properties

Odor description: oakmoss-like, cheese
Odor threshold: 18.34 ppb (1 source, non-SIDA)
Volatility: high
CAS number: 502-56-7

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.

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	24.6 µg/L air	24.6–24.6	3	1	one paper
food matrix	8.2 ppb	8.2–8.2	1	1	one paper
unstated	8.2 ppb	8.2–40	4	4	yes

Found in

Measured impact first, then profile share

Every ingredient known to contain 5-nonanone. 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 5-nonanone in it.

26 cmpds

146 cmpds

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Try the pairing tools to see which ingredient combinations rely on 5-nonanone, or compare two ingredients side-by-side.