2-[(4-Chloro-2-nitrophenyl)azo)-N-(2-methoxyphenyl)-3-oxobutanamide (Pigment Yellow 73) and its salts, when used as a substance in hair dye products
⚠ EU RestrictedIdentification
CAS Number 13515-40-7
EINECS / EC 236-852-7
CosIng Ref 31107
Chemical Name 2-[(4-chloro-2-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide
IUPAC Name —
Formula C17H15ClN4O5
Mol. Weight 390.8 g/mol
InChIKey QPHCXDDGQQLPIM-UHFFFAOYSA-N
Function & Classification
EU Regulatory Status
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Safety Profile
No toxicology data available yet for this ingredient.
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NOAEL · Dermal Absorption % · Sensitization
Formulation Guidelines
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Usage Level % · Addition Phase · Solubility
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