Acid Red 51
✓ EU AllowedIdentification
CAS Number 16423-68-0
EINECS / EC 240-474-8
CosIng Ref 30485
Chemical Name Disodium 2-(2,4,5,7-tetraiodo-6-oxido-3-oxoxanthen-9-yl)benzoate and its insoluble barium, strontium and zirconium lakes, salts and pigments
Formula C20H8I4O5
Mol. Weight 835.9 g/mol
Function & Classification
Primary Function Colorant
Secondary Functions HAIR DYEING
Origin Synthetic
Category Colorants & Pigments
EU Regulatory Status
Conditions of Use Purity criteria as set out in Commission Directive 95/45/EC (E 127)
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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