Ingredient

Acid Blue 1

✓ EU Allowed

Identification

CAS Number 129-17-9
EINECS / EC 204-934-1
CosIng Ref 31609
Chemical Name sodium 4-[[4-(diethylamino)phenyl]-(4-diethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)methyl]benzene-1,3-disulfonate
IUPAC Name
Formula C27H31N2NaO6S2
Mol. Weight 566.7 g/mol
SMILES CCN(CC)C1=CC=C(C=C1)C(=C2C=CC(=[N+](CC)CC)C=C2)C3=C(C=C(C=C3)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+]
InChIKey SJEYSFABYSGQBG-UHFFFAOYSA-M

Function & Classification

Primary Function Colorant
Category Colorants & Pigments

EU Regulatory Status

🇪🇺
✓ Allowed — EU Reg. 1223/2009 II/1355 (Acid Blue 1; CI 42045: when used as a substance in hair dye products)

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

Suppliers & Documents

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Documents

External Resources