Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzene sulfonate
⚠ EU RestrictedIdentification
CAS Number 633-96-5
EINECS / EC 211-199-0
CosIng Ref 98860
Chemical Name sodium 4-[(2-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate
IUPAC Name —
Formula C16H11N2NaO4S
Mol. Weight 350.3 g/mol
SMILES C1=CC=C2C(=C1)C=CC(=C2N=NC3=CC=C(C=C3)S(=O)(=O)[O-])O.[Na+]
InChIKey CQPFMGBJSMSXLP-UHFFFAOYSA-M
Function & Classification
Primary Function HAIR DYEING
EU Regulatory Status
Max Leave-on 5%
SCCS Opinion View SCCS opinion →
Safety Profile
No toxicology data available yet for this ingredient.
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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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