Is Crotonic Acid safe in cosmetics?
Crotonic Acid has a safety rating of "MODERATE" in our database. EU status: prohibited. US status: permitted.
Moderate
Cosmetic Ingredient
Crotonic Acid
INCI: CROTONIC ACID
Crotonic Acid (CAS 3724-65-0 (trans-isomer)) is a cosmetic cosmetic ingredient functioning as Monomer/co-monomer in hair-fixative polymers. EU Regulation 1223/2009 status: prohibited. Industrial safety data is also available in the chemical safety database.
View industrial chemical safety profile for CAS 3724-65-0 (trans-isomer) →
Auto-generated CPSR Part A draft with source citations
Function
Monomer/co-monomer in hair-fixative polymers
Safety Rating
MODERATE
Regulatory Status
EU EU Status
prohibited
US US Status
permitted
US Notes
No specific FDA cosmetic restriction when polymerized. Free acid form is corrosive and not intended for direct use.
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Crotonic Acid.
Calculate MoS for your specific formulation with the MoS Calculator.
Expert Verdict
Expert safety assessment and concern-level summary for Crotonic Acid.
Frequently Asked Questions
Is Crotonic Acid allowed in the EU?
Crotonic Acid EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.
What does Crotonic Acid do in cosmetics?
Crotonic Acid functions as: Monomer/co-monomer in hair-fixative polymers. It is classified as a cosmetic ingredient in our database. CAS number: 3724-65-0 (trans-isomer).
Compliance Tools
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Substance Compliance
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MoS Calculator
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Heavy Metal Limits
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