4-(2,4-Dihydroxyphenylazo)benzensulphonic acid (CAS 2050-34-2; EINECS 218-087-0) and its sodium salt (Acid Orange 6; CI 14270) (CAS 547-57-9; EINECS 208-924-8) when used as substance in hair dye products
⚠ EU RestrictedIdentification
CAS Number 2050-34-2 -- 547-57-9
EINECS / EC 218-087-0 -- 208-924-8
CosIng Ref 87712
Chemical Name 4-(2,4-Dihydroxyphenylazo)benzensulphonic acid
Function & Classification
EU Regulatory Status
Safety Profile
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
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