Is Timonacic safe in cosmetics?
Timonacic has a safety rating of "GOOD" in our database. EU status: restricted. US status: restricted.
Good
Cosmetic Ingredient
Timonacic
INCI: TIMONACIC (SYNONYM: THIAZOLIDINE-4-CARBOXYLIC ACID / THIOPROLINE)
Timonacic (CAS 444-27-9 (racemic); 45521-09-3 (S-isomer)) is a cosmetic cosmetic ingredient functioning as Antioxidant, hair conditioning agent, keratin-binding agent. EU Regulation 1223/2009 status: restricted. Industrial safety data is also available in the chemical safety database.
View industrial chemical safety profile for CAS 444-27-9 (racemic); 45521-09-3 (S-isomer) →
Auto-generated CPSR Part A draft with source citations
Function
Antioxidant, hair conditioning agent, keratin-binding agent
Safety Rating
GOOD
Regulatory Status
EU EU Status
restricted
US US Status
restricted
US Notes
Not specifically restricted; FDA UNII assigned (E5913T3IBL); permitted in cosmetics under general FDCA provisions
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Timonacic.
Calculate MoS for your specific formulation with the MoS Calculator.
Expert Verdict
Expert safety assessment and concern-level summary for Timonacic.
Frequently Asked Questions
Is Timonacic allowed in the EU?
Timonacic EU regulatory status: restricted. This is based on EU Regulation 1223/2009 and its amendments.
What does Timonacic do in cosmetics?
Timonacic functions as: Antioxidant, hair conditioning agent, keratin-binding agent. It is classified as a cosmetic ingredient in our database. CAS number: 444-27-9 (racemic); 45521-09-3 (S-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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