Tetrasodium 6-amino-4-hydroxy-3-[[7-sulphonato-4-[(4-sulphonatophenyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulphonate (Food Black 2; CI 27755) when used as a substance in hair dye products
⚠ EU RestrictedIdentification
CAS Number 2118-39-0
EINECS / EC 218-326-9
CosIng Ref 87680
Chemical Name tetrasodium;6-amino-4-hydroxy-3-[[7-sulfonato-4-[(4-sulfonatophenyl)diazenyl]naphthalen-1-yl]diazenyl]naphthalene-2,7-disulfonate
IUPAC Name —
Formula C26H15N5Na4O13S4
Mol. Weight 825.7 g/mol
SMILES C1=CC(=CC=C1N=NC2=C3C=CC(=CC3=C(C=C2)N=NC4=C(C5=CC(=C(C=C5C=C4S(=O)(=O)[O-])S(=O)(=O)[O-])N)O)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+].[Na+]
InChIKey BZJNMKDNHPKBHE-UHFFFAOYSA-J
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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