Ammonium Thioglycolate
⚠ EU RestrictedIdentification
CAS Number 5421-46-5
EINECS / EC 226-540-9
CosIng Ref 31902
Chemical Name Ammoniummercaptoacetate,
Formula C2H7NO2S
Mol. Weight 109.15 g/mol
Function & Classification
Primary Function Keratolytic
Secondary Functions HAIR WAVING OR STRAIGHTENING; REDUCING
Origin Synthetic
Category Other
EU Regulatory Status
Max Leave-on 8%
Max Rinse-off 11%
Restrictions Max 8% (general use, pH 7–9.5); Max 11% (professional use, pH 7–9.5); Max 5% (rinse-off hair, general).
Conditions of Use Hair waving/straightening: max 8% (pH 7-9.5). Depilatory: max 5% (pH 7-12.7). Professional only for higher concentrations.
Mandatory Warning For professional use only. Can cause allergic reactions. Contains thioglycolate.
Safety Profile
2 / 10
No toxicology data available yet for this ingredient.
Check SCCS opinions or CIR reports for published safety assessments.
NOAEL · Dermal Absorption % · Sensitization
Formulation Guidelines
Usage level, pH range, solubility and addition phase not yet available.
Usage Level % · Addition Phase · Solubility
Suppliers & Documents
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Documents