Fragrance avoidance
Not a strong fit for fragrance avoidance because it carries Fragrance.
The ingredient itself is a fragrance-linked signal, so it is better treated as an avoid case when fragrance exposure is the main concern.
- beauty
- cleaning
4-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-2-butanone
CAS 49749-39-5
Also registered as 1 other CAS number
31499-72-6
Concern score
Not assessed — no hazard data yet.
4-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-2-butanone in plain language
On cosmetic ingredient lists it appears as “Dihydro-alpha-ionone”.
Also known as Dihydro-alpha-ionone · Dihydro-.alpha.-ionone · (±)-dihydro-.alpha.-ionone · .ALPHA.-7,8-DIHYDROIONONE · 4-(2,6,6-TRIMETHYL-2-CYCLOHEXEN-1-YL-2-BUTANONE · 4-(2,6,6-Trimethylcyclohex-2-en-1-yl)butan-2-one
Show all 21 names
Dihydro-.alpha.-ionone, (±)- · (+/-)-dihydro-.alpha.-ionone · 2',2''-Dihydro-.alpha.-ionone · 2-butanone, 4-(2,6,6- trimethyl-2-cyclohexen-1-yl)- · 3,4-Dihydro-α-ionone · 4-((1R)-2,6,6-trimethylcyclohex-2-en-1-yl)butan-2-one · 4-(2,2,6-Trimethyl-5-cyclohexen-1-yl)-2-butanone · 4-(2,6,6-TRIMETHYL-2-CYCLOHEXEN-1-YL)BUTAN-2-ONE · 4-(2,6,6-Trimethyl-2-cyclohexenyl)butan-2-one · Dihydro-.alpha.-ionone, (+/-)- · Dihydro-α-ionone · Jhjchcsuegpige-uhfffaoysa-n · UNII-20P9Z50AR5 · alpha-Dihydroionone · α-7,8-Dihydroionone
Used in cosmetics as a fragrance ingredient.
- Perfuming
- Fragrance
- Flavouring
- We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.
Regulation
No restrictions found. 4-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-2-butanone appears in these published regulatory listings.
- Found in consumer products
- Cleaning
EUCosIngActiveListed in CosIng inventory for cosmetic use.
- Listed in CosIng inventory for cosmetic use.Source →
USEPAcommercial use observedEPA CPDat observed this chemical in 2 composition records across product categories including Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including Fragrance, Flavouring and nutrient.
- EPA CPDat observed this chemical in 2 composition records across product categories including Cleaning products and household care. 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 4-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-2-butanone. 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 4-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-2-butanone yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.
Where this comes from
- Open →
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 →
PubChem Live Enrichment
chemistry · updated 2026-05-17
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
Avoid
Where it has been recorded
How often EPA CPDat has listed 4-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-2-butanone in a product composition. These are source records, not Greenveil catalog products.
Source records
2
Named organisations
5
Cleaning products and household care
Typical roles
PerfumingFragranceFlavouring