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.alpha.-irone

CAS 54082-69-8

Also registered as 1 other CAS number

79-69-6

Concern score

Not assessed — no hazard data yet.

.alpha.-irone in plain language

What it is

On cosmetic ingredient lists it appears as “5-METHYL-ALPHA-IONONE”.

Also known as 5-METHYL-ALPHA-IONONE · 4-(2,5,6,6-Tetramethyl-2-cyclohexen-1-yl)-3-buten-2-one · alpha-Irone · (±)-.alpha.-irone · .alpha.-ionone, 6-METHYL- · 3-BUTEN-2-ONE, 4-(2,5,6,6-TETRAMETHYL-2-CYCLOHEXEN-1-YL)-

Show all 20 names

4-(2,5,6,6-TETRAMETHYLCYCLOHEX-2-ENYL)BUT-3-EN-2-ONE · 4-(2,5,6,6-Tetramethylcyclohex-2-en-1-yl)but-3-en-2-one · 6-METHYL-.ALPHA.-IONONE · 6-METHYLIONONE · Irone, alpha- · (+/-)-.alpha.-irone · 3-buten-2-one, 4-(2,5,6,6- tetramethyl-2-cyclohexen-1- yl)- · 4-(2,5,6,6-Tetramethyl-2-cyclohexenyl)-3-buten-2-one · 6-Methyl-α-ionone · Irone · Methyl-α-ionone · α-Ionone, 6-methyl- · α-Ionone, methyl- · α-Irone

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. .alpha.-irone 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 Vehicle. 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 Vehicle. EPA CPDat classifies this chemical for functional uses including Fragrance, Flavouring and nutrient.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as mixture.
    • openFDA substance registry classifies this ingredient as mixture.Source →

Expert safety opinions

No expert opinion on file for .alpha.-irone. 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 .alpha.-irone 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

  • CosIng

    regulatory · updated 2026-09-23

    Open →
  • 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 →

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 .alpha.-irone in a product composition. These are source records, not Greenveil catalog products.

Source records

1

Named organisations

4

Vehicle

Typical roles

PerfumingFragranceFlavouring
See products using .alpha.-irone →