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  • industrial

(E)-5-Methyl-2-hepten-4-one

CAS 81925-81-7

Also registered as 2 other CAS numbers

130464-61-8 · 102322-83-8

(E)-5-Methyl-2-hepten-4-one chemical structure

Concern score

Not assessed — no hazard data yet.

(E)-5-Methyl-2-hepten-4-one in plain language

What it is

On cosmetic ingredient lists it appears as “TRANS-5-METHYL-2-HEPTEN-4-ONE”.

Also known as TRANS-5-METHYL-2-HEPTEN-4-ONE · 5-METHYL-2-HEPTEN-4-ONE · (2E)-5-Methylhept-2-en-4-one · (E)-5-methylhept-2-en-4-one · (±)-filbertone · (+/-)-5-METHYL-2-HEPTEN-4-ONE

Show all 20 names

(+/-)-filbertone · (2E)-5-Methyl-2-hepten-4-one · (±)-5-METHYL-2-HEPTEN-4-ONE · 2-HEPTEN-4-ONE, 5-METHYL- · 2-HEPTEN-4-ONE, 5-METHYL-, (e)- · 2-Hepten-4-one, 5-methyl-, (2E)- · 5-METHYL-2-HEPTEN-4-ONE, (+/-)- · 5-METHYL-2-HEPTEN-4-ONE, (±)- · 5-METHYLHEPT-2-EN-4-ONE · 5-Methyl-(E)-2-hepten-4-one · 5-Methyl-2-hepten-4-one, predominantly trans · Arjwaurhqdjjac-gqctyliasa-n · Filbertone · UNII-8K2S58736F

What it does

Used in cosmetics as a fragrance ingredient.

  • Perfuming
  • Fragrance
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. (E)-5-Methyl-2-hepten-4-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 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Fragrance.
    • 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.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 (E)-5-Methyl-2-hepten-4-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 (E)-5-Methyl-2-hepten-4-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 2019-12-20

    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)-5-Methyl-2-hepten-4-one in a product composition. These are source records, not Greenveil catalog products.

Named organisations

1

Typical roles

PerfumingFragrance
See products using (E)-5-Methyl-2-hepten-4-one →