What does 2,4-Pentanedione do?

Used in cosmetics as an adhesive.

Is 2,4-Pentanedione safe?

We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

beauty
cleaning
industrial

2,4-Pentanedione

CAS 1522-20-9

Also registered as 3 other CAS numbers

14024-62-5 · 81235-32-7 · 123-54-6

Concern score

Not assessed — no hazard data yet.

2,4-Pentanedione in plain language

What it is: On cosmetic ingredient lists it appears as “Pentanedione”.
Also known as Pentanedione · Acetyl acetone · Acetylacetone · Acetylacetone enol · Pentane-2,4-dione · 2,4-Dioxopentane
Show all 25 names
2,4-Pentadione · 2,4-Pentandione · 2-4 pentanedione · 2-4 pentanedione (vapor pressure 6.9 mm hg @ 68f) · 2-4 pentanedione (vp = 6.9 @ 68f) · 2-4 pentanedione (vp: 6.9 mmgh @ 68f) · 2-Propanone, acetyl- · 3-PENTEN-2-ONE, 4-HYDROXY- · 4-HYDROXY-3-PENTEN-2-ONE · Acac · Acetylaceton · Acetoacetone · Acetone, acetyl- · Acetyl 2-propanone · Diacetylmethane · Hacac · Pentan-2,4-dione · Pentane-2,3-dione · Pentanedione-2,4
What it does: Used in cosmetics as an adhesive.
Adhesive
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. 2,4-Pentanedione appears in these published regulatory listings.

Recorded in these product areas

Found in consumer products
Beauty
Cleaning
Industrial

EUCosIngActivePentanedione is the organic compound that conforms to the formula
- Pentanedione is the organic compound that conforms to the formulaSource →
USEPAcommercial use observedEPA CPDat observed this chemical in 700 composition records across product categories including Furniture and furnishings, Raw materials, Home maintenance. EPA CPDat classifies this chemical for functional uses including No specific technical function.
- EPA CPDat observed this chemical in 700 composition records across product categories including Furniture and furnishings, Raw materials, Home maintenance. EPA CPDat classifies this chemical for functional uses including No specific technical function.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 2,4-Pentanedione. 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 2,4-Pentanedione 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 jan 24 1989
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

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.

Where it has been recorded

How often EPA CPDat has listed 2,4-Pentanedione in a product composition. These are source records, not Greenveil catalog products.

Source records

700

Named organisations

Furniture and furnishingsRaw materialsHome maintenanceSpecialty occupational productsCleaning and safetyVehicle

Typical roles

Adhesive

See products using 2,4-Pentanedione →