Acid Red 33
✓ EU AllowedIdentification
CAS Number 3567-66-6
EINECS / EC 222-656-9
CosIng Ref 82173
Chemical Name Disodium 5-amino-4-hydroxy-3-(phenylazo)naphathlene-2,7-disulphonate (CI 17200)
Formula C16H11N3Na2O7S2
Mol. Weight 467.4 g/mol
Function & Classification
Primary Function Colorant
Origin Synthetic
EU Regulatory Status
Max Leave-on 0.5%
SCCS Opinion View SCCS opinion →
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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