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GREENVEIL

  • beauty
  • industrial

5-HEXEN-2-ONE

CAS 109-49-9

5-HEXEN-2-ONE chemical structure

Concern score

Not assessed — no hazard data yet.

5-HEXEN-2-ONE in plain language

What it is

Also known as 5-Hexene-2-one · Hex-5-en-2-one · 1-Hexen-5-one · 1-hexene-5-one · 3-Buten-1-yl Methyl Ketone · 5-Hexen-2-one, 99%

Show all 13 names

5-hexen-1-one · 5-hexene-2-on · 5-oxo-1-hexene · Allyl acetone · Allylacetone · Rndvgjzuhckenf-uhfffaoysa-n · UNII-XWM6RL9YEI

What it does

Used in cosmetics as a fragrance ingredient.

  • Perfuming
  • Fragrance
  • Flavouring
Is it a concern?
We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

Regulation

No restrictions found. 5-HEXEN-2-ONE appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Industrial
  • EUCosIngActiveListed in CosIng inventory for cosmetic use.
    • Listed in CosIng inventory for cosmetic use.Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 1 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 1 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 →

Expert safety opinions

No expert opinion on file for 5-HEXEN-2-ONE. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

Evidence & sources

No graded research studies for 5-HEXEN-2-ONE yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

6 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EPA Chemical and Products Database

    exposure · updated 2022-06-22

    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 5-HEXEN-2-ONE in a product composition. These are source records, not Greenveil catalog products.

Source records

1

Named organisations

4

Typical roles

PerfumingFragranceFlavouring
See products using 5-HEXEN-2-ONE →