Is Amidinocysteine safe in cosmetics?
Amidinocysteine has a safety rating of "MODERATE" in our database. EU status: permitted. US status: permitted.
Moderate
Cosmetic Ingredient
Amidinocysteine
INCI: AMIDINOCYSTEINE
Amidinocysteine (CAS 40454-21-5 (N-amidino-L-cysteine)) is a cosmetic cosmetic ingredient functioning as Hair waving or straightening (modifies disulfide bonds in keratin). EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database.
View industrial chemical safety profile for CAS 40454-21-5 (N-amidino-L-cysteine) →
Auto-generated CPSR Part A draft with source citations
Function
Hair waving or straightening (modifies disulfide bonds in keratin)
Safety Rating
MODERATE
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
Not restricted by FDA; no specific CIR monograph
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Amidinocysteine.
Calculate MoS for your specific formulation with the MoS Calculator.
Expert Verdict
Expert safety assessment and concern-level summary for Amidinocysteine.
Frequently Asked Questions
Is Amidinocysteine allowed in the EU?
Amidinocysteine EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Amidinocysteine do in cosmetics?
Amidinocysteine functions as: Hair waving or straightening (modifies disulfide bonds in keratin). It is classified as a cosmetic ingredient in our database. CAS number: 40454-21-5 (N-amidino-L-cysteine).
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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