cyclopentanone

fruity ketone

Found in 392 ingredients across the CompKitchen flavor graph.

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

2D Lewis Structure

Formula: C5H8O
Molecular weight: 84.12 g/mol
PubChem CID: 8452 — full record on PubChem

Properties

Odor description: minty
Odor threshold — in air: 31.0 ppb 1 published value · see all 1 with sources
Volatility: high
CAS number: 120-92-3
Retention index: 1183

Regulatory · United States

FEMA GRAS — Generally Recognized As Safe for flavoring use

✓ Exact match

FEMA number: 3910
GRAS publication: GRAS 19
FEMA primary name: CYCLOPENTANONE

Use-level matrix not extracted for this substance — check the source publication for current ppm guidance.

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

cyclopentanone-m

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

Published thresholds

1 measured value 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 air

31.0 ppb

Airborne detection — not comparable to a water threshold.

Threshold	Matrix	Source	Paper
31.0 ppb	air (food: reference standard (air))	Literature corpus	25482491

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	3.793e+04 µg/L air	2.82e+04–5.11e+04	3	1	one paper
ethanol solution	5.11e+04 ppb	5.11e+04–5.11e+04	1	1	one paper
food matrix	9300 ppb	84–4.7e+04	3	3	no (2.7 decades)
unstated	9300 ppb	9.3e+03–9.3e+03	2	2	yes

Found in

Measured impact first, then profile share

Every ingredient known to contain cyclopentanone. 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 cyclopentanone in it.

33 cmpds

83 cmpds

83 cmpds

84 cmpds