Acid Yellow 23
✓ EU AllowedIdentification
CAS Number 1934-21-0
EINECS / EC 217-699-5
CosIng Ref 31637
Chemical Name Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate (CI 19140)
Formula C16H9N4Na3O9S2
Mol. Weight 534.4 g/mol
Function & Classification
Primary Function Colorant
Origin Synthetic
EU Regulatory Status
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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