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
3-Imidazol-4-ylacrylic acid (Urocanic acid) and its ethyl ester
CAS 27538-35-8 · 100/100 · High conf.
Also registered as 1 other CAS number
104-98-3
Concern score
100/100Critical concern based on regulatory listings.
High confidence
3-Imidazol-4-ylacrylic acid (Urocanic acid) and its ethyl ester in plain language
On cosmetic ingredient lists it appears as “Ethyl urocanate”.
Also known as Ethyl urocanate · Urocanic acid · Ethyl 3-(1H-imidazol-5-yl)prop-2-enoate · 2-Propenoic acid, 3-(1H-imidazol-4-yl)- · 2-Propenoic acid, 3-(1H-imidazol-5-yl)-, ethyl ester · ethyl 3-(1H-imidazol-4-yl)acrylate
Used in cosmetics as a UV filter and a skin-conditioning agent.
- UV absorber
- Skin conditioning
- Conditioner
- Critical concern: no hazard classifications on record. It is banned in EU cosmetics.
Why it's flagged
3-Imidazol-4-ylacrylic acid (Urocanic acid) and its ethyl ester 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.
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 UV stabilizer, Softener and conditioner.
- EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including UV stabilizer, Softener and conditioner.Source →
Expert safety opinions
No expert opinion on file for 3-Imidazol-4-ylacrylic acid (Urocanic acid) and its ethyl ester. 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 3-Imidazol-4-ylacrylic acid (Urocanic acid) and its ethyl ester yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.
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 3-Imidazol-4-ylacrylic acid (Urocanic acid) and its ethyl ester in a product composition. These are source records, not Greenveil catalog products.
Named organisations
1
Typical roles
UV absorberSkin conditioningConditioner