Database/Hair Dyeing/Pigment Yellow 13
100% petroleum · ISO 16128

Is Pigment Yellow 13 natural?

No. Dichlorobenzidine and 2,4-dimethylacetoacetanilide derive from petrochemical benzene and xylene, acetic chemistry and chlorination, and the pigment carries no mineral counter-ion.

INCI namePigment Yellow 13
CAS5102-83-0
FormulaC36H34Cl2N6O4 · 685.6 Da
FunctionHair Dyeing
FeedstockDominant route tetrazotises 3,3'-dichlorobenzidine and couples it with…

How we scored it

C36H34Cl2N6O4 = 685.6 Da; metal-free diarylide azo pigment, every atom from petrochemical aromatics (aryl chlorine counted with the framework), no mineral counter-ion: 0/685.6 = 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 tetrazotises 3,3'-dichlorobenzidine and couples it with acetoacet-2,4-xylidide, all petrochemical aromatics. No natural-origin route exists.

In plain English

A synthetic yellow organic pigment (a diarylide azo colour) listed for hair dyeing. It is built entirely from petrochemical aromatic chemicals, a dichlorobenzidine and an acetoacetanilide, with no mineral part.

CosIng definition: Pigment Yellow 13 is classed chemically as a disazo colour. It conforms to the formula:

Natural alternatives with the same function

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 Epicatechin 100% natural origin

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 Lawsonia Inermis Extract 100% natural origin

A plant extract from the henna shrub, used to condition hair and skin and add a reddish tint.…

 Pyrogallol 100% natural origin

A hair-dye ingredient traditionally made by heating gallic acid, itself extracted from plant tannins in gallnuts, until it…

Structure

2D structure of Pigment Yellow 13

2-[[2-chloro-4-[3-chloro-4-[[1-(2,4-dimethylanilino)-1,3-dioxobutan-2-yl]diazenyl]phenyl]phenyl]diazenyl]-N-(2,4-dimethylphenyl)-3-oxobutanamide

PubChem CID 73462 ↗

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 13. PubChem CID 73462. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3PIGMENT YELLOW 13. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4PIGMENT YELLOW 13. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=PIGMENT%20YELLOW%2013