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  • industrial

6-Pentyl-5,6-dihydro-2H-pyran-2-one

CAS 54814-64-1

Also registered as 2 other CAS numbers

501-23-5 · 21488-85-7

6-Pentyl-5,6-dihydro-2H-pyran-2-one chemical structure

Concern score

Not assessed — no hazard data yet.

6-Pentyl-5,6-dihydro-2H-pyran-2-one in plain language

What it is

Also known as (+-)-Massoia lactone · Massoilactone, (+/-)- · Massoilactone, (±)- · (±)-massoia lactone · (±)-massoilactone · (±)-massoja decalactone

Show all 24 names

2-pentyl-2,3-dihydropyran-6-one · (+/-)-massoia lactone · (+/-)-massoja decalactone · (+/-)-Massoilactone · (R)-massoia lactone · 1,5- lactone · 2-DECENOIC acid, 5-HYDROXY-, .delta.-lactone · 2-Decen-5-olide · 2-Decenoic acid, 5-hydroxy-, δ-lactone · 2H-Pyran-2-one, 5,6-dihydro-6-pentyl- · 5,6-Dihydro-6-pentyl-2H-pyran-2-one · 5-Hydroxy-2-decenoic acid, delta-lactone (natural) · 6-PENTYL-5,6-DIHYDROPYRAN-2-ONE · C-10-Massoia lactone · Cocolactone · Dec-2-eno-1,5-lactone · Massoia lactone · UNII-KUC3Q7KGG6

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. 6-Pentyl-5,6-dihydro-2H-pyran-2-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 Flavouring and nutrient, 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 Flavouring and nutrient, Fragrance.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 6-Pentyl-5,6-dihydro-2H-pyran-2-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 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 6-Pentyl-5,6-dihydro-2H-pyran-2-one in a product composition. These are source records, not Greenveil catalog products.

Named organisations

2

Typical roles

FragranceFlavouring
See products using 6-Pentyl-5,6-dihydro-2H-pyran-2-one →