Skip to content

GREENVEIL

  • industrial

(E)-2-(Pent-2-enyl)cyclopentan-1-one

CAS 51608-18-5

(E)-2-(Pent-2-enyl)cyclopentan-1-one chemical structure

Concern score

Not assessed — no hazard data yet.

(E)-2-(Pent-2-enyl)cyclopentan-1-one in plain language

What it is

Also known as 2-(TRANS-2-PENTENYL)CYCLOPENTANONE · 2-(2-PENTENYL)CYCLOPENTANONE, (2E)- · Cyclopentanone, 2-(2-PENTENYL)-, (e)- · 2-(2-PENTENYL)CYCLOPENTANONE, trans- · 2-(2E)-2-Penten-1-ylcyclopentanone · Cyclopentanone, 2-(2E)-2-penten-1-yl-

Show all 9 names

Cyclopentanone, 2-(2E)-2-pentenyl- · UNII-2QR3Z9GTKN · jasminone

What it does

Used in consumer products as a fragrance ingredient and a flavouring.

  • Fragrance
  • Flavouring
Is it a concern?
We haven't assessed a concern score for this ingredient yet.

Regulation

No restrictions found. (E)-2-(Pent-2-enyl)cyclopentan-1-one appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Industrial
  • USEPAcommercial use observedEPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Fragrance, Flavouring and nutrient.
    • EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Fragrance, Flavouring and nutrient.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Evidence & sources

No graded research studies for (E)-2-(Pent-2-enyl)cyclopentan-1-one yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

5 data sources

Where this comes from

  • EPA Chemical and Products Database

    exposure · updated February 8, 2019

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

  • PubChem Live Enrichment

    chemistry · updated 2026-05-17

    Open →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Fragrance avoidance

Not a strong fit for fragrance avoidance because it carries Fragrance.

Avoid

The ingredient itself is a fragrance-linked signal, so it is better treated as an avoid case when fragrance exposure is the main concern.

Where it has been recorded

How often EPA CPDat has listed (E)-2-(Pent-2-enyl)cyclopentan-1-one in a product composition. These are source records, not Greenveil catalog products.

Named organisations

2

Typical roles

FragranceFlavouring
See products using (E)-2-(Pent-2-enyl)cyclopentan-1-one →