Database/Hair Dyeing/Pigment Yellow 73
100% petroleum · ISO 16128

Is Pigment Yellow 73 natural?

No. Chloronitroaniline, the acetoacet-o-anisidide coupling component and the azo link are all petrochemical aromatics, and chlorine bonded to carbon is counted as petrochemical.

INCI namePigment Yellow 73
CAS13515-40-7
FormulaC17H15ClN4O5 · 390.8 Da
FunctionHair Dyeing
FeedstockDominant route: diazotised 4-chloro-2-nitroaniline is coupled onto acetoacet-o-anisidide,…

How we scored it

C17H15ClN4O5 monoazo arylide yellow: all C, N, O and the C-bonded chlorine are petrochemical; no salt or mineral part; 0/391 = 0.0.
What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.

Where it comes from

Dominant route: diazotised 4-chloro-2-nitroaniline is coupled onto acetoacet-o-anisidide, both from petrochemical aromatics. No natural-origin route exists.

In plain English

A bright greenish-yellow synthetic azo pigment, listed here as a hair-dye colourant. It is made in a chemical plant from petroleum-derived aromatic chemicals.

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Structure

2D structure of Pigment Yellow 73

2-[(4-chloro-2-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

PubChem CID 61637 ↗

References

  1. 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
  2. 2Pigment Yellow 73. PubChem CID 61637. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3PIGMENT YELLOW 73. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4PIGMENT YELLOW 73. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=PIGMENT%20YELLOW%2073