Is Ammonium Thiolactate safe in cosmetics?
Ammonium Thiolactate has a safety rating of "MODERATE" in our database. EU status: restricted. US status: permitted.
Moderate
Cosmetic Ingredient
Ammonium Thiolactate
INCI: AMMONIUM THIOLACTATE
Ammonium Thiolactate (CAS 13419-67-5) is a cosmetic cosmetic ingredient functioning as Reducing agent for permanent waving and hair straightening. NOAEL 150 mg/kg bw/day (cross-referenced against ToxValDB ECHA IUCLID); EU Regulation 1223/2009 status: restricted, max 8%. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety data.
View industrial chemical safety profile for CAS 13419-67-5 →
Auto-generated CPSR Part A draft with source citations
Function
Reducing agent for permanent waving and hair straightening
Safety Rating
MODERATE
Regulatory Status
EU EU Status
restricted
EU Max Conc.
8%
US US Status
permitted
US Notes
Permitted; same CIR grouping as thioglycolate family
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Ammonium Thiolactate.
Calculate MoS for your specific formulation with the MoS Calculator.
Pre-Calculated Safety Assessment
Pre-calculated NOAEL → SED → MoS audit trail for Ammonium Thiolactate across SCCS product categories, with measured dermal absorption where available.
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
10 - 100 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Depilatory
Hair waving or straightening
Reducing agent
Expert Verdict
Expert safety assessment and concern-level summary for Ammonium Thiolactate.
Chemical Function
Reducing agent
Depilatory
Hair waving or straightening
Australian Status
AICIS status: listed_with_terms
Specific information requirements: Obligations to provide information apply. You must tell us within 28 days if the circumstances of your importation or manufacture (introduction) are different to those in our assessment.
Frequently Asked Questions
Is Ammonium Thiolactate allowed in the EU?
Ammonium Thiolactate EU regulatory status: restricted. Maximum allowed concentration: 8%. This is based on EU Regulation 1223/2009 and its amendments.
What does Ammonium Thiolactate do in cosmetics?
Ammonium Thiolactate functions as: Reducing agent for permanent waving and hair straightening. It is classified as a cosmetic ingredient in our database. CAS number: 13419-67-5.
Is Ammonium Thiolactate used outside cosmetics?
Ammonium Thiolactate also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Compliance Tools
Check Ammonium Thiolactate compliance across multiple jurisdictions:
Ingredient Decoder
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82 Allergen Checker
Check for EU declarable fragrance allergens
Substance Compliance
Check compliance across multiple jurisdictions
MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
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