Fragrance avoidance
No fragrance-linked caution surfaced in the current profile.
This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.
- beauty
- industrial
2-Hexanone
CAS 591-78-6 · 100/100 · High conf.
Also registered as 1 other CAS number
30637-87-7
Concern score
100/100Critical concern driven by cmr.
High confidence
2-Hexanone in plain language
Also known as Methyl-n-butyl ketone · Methyl butyl ketone · Methylbutylketone · Hexan-2-one (Methyl butyl ketone) · Hexan-2-one · Mbk
Show all 18 names
2-Oxohexane · Butyl methyl ketone · Butylmethyl Ketone · Hexanone · Hexanone-2 · Methyl n-Butyl Ketone · Mnbk · Propylacetone · hexan-2-ona · hexane-2-one · methyl n-butyl ketone (2-hexanone) · n-Butyl methyl ketone
Used in consumer products as a flavouring.
- Flavouring
- Critical concern: classified for carcinogenic, mutagenic or reproductive toxicity (CMR). It is banned in EU cosmetics.
Why it's flagged
- Cmr
Hexan-2-one (Methyl butyl ketone) is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.
RestrictedEU EC — banned
The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.
Regulation
Restrictions first, then routine listings from published regulatory sources.
- EU Annex II — prohibited
- EU prohibited in cosmetics
- Found in consumer products
- Industrial
- View source →banned
EUEC
Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products. CMR: Reprotoxic Cat. 2(when C=>5%)
EUCosIngActiveCosmetics Regulation annex II / ref 1074.
- Cosmetics Regulation annex II / ref 1074.Source →
USEPAcommercial use observedEPA CPDat observed this chemical in 24 composition records across product categories including Vehicle, Laboratory supplies, Home maintenance. EPA CPDat classifies this chemical for functional uses including Flavouring and nutrient.
- EPA CPDat observed this chemical in 24 composition records across product categories including Vehicle, Laboratory supplies, Home maintenance. EPA CPDat classifies this chemical for functional uses including 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 2-Hexanone. 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 2-Hexanone 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 →
EU CosIng Cosmetics Regulation Annexes
regulatory · updated 2010-10-21
- Open →
EPA Chemical and Products Database
exposure · updated March 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.
Good fit
Where it has been recorded
How often EPA CPDat has listed 2-Hexanone in a product composition. These are source records, not Greenveil catalog products.
Source records
24
Named organisations
4
VehicleLaboratory suppliesHome maintenanceIndustrial products
Typical roles
Flavouring