4-(Phenylazo)resorcinol (Solvent Orange 1; CI 11920) and its salts, when used as a substance in hair dye products
⚠ EU RestrictedIdentification
CAS Number 2051-85-6
EINECS / EC 218-131-9
CosIng Ref 87707
Chemical Name 4-phenyldiazenylbenzene-1,3-diol
IUPAC Name —
Formula C12H10N2O2
Mol. Weight 214.22 g/mol
InChIKey BPTKLSBRRJFNHJ-UHFFFAOYSA-N
Function & Classification
EU Regulatory Status
Safety Profile
No toxicology data available yet for this ingredient.
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NOAEL · Dermal Absorption % · Sensitization
Formulation Guidelines
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Usage Level % · Addition Phase · Solubility
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