Database/Colorant/Pigment Yellow 3
100% petroleum · ISO 16128

Is Pigment Yellow 3 natural?

No. Both aromatic halves derive from benzene, the acetoacetyl unit from petrochemical diketene, and carbon-bound chlorine counts with the petrochemical framework.

INCI namePigment Yellow 3
CAS6486-23-3
FormulaC16H12Cl2N4O4 · 395.2 Da
FunctionColorant
FeedstockDiazotised 4-chloro-2-nitroaniline is coupled with acetoacet-2-chloroanilide, both made…

How we scored it

C16H12Cl2N4O4 (395.2 Da): azo coupling of 4-chloro-2-nitroaniline and acetoacet-2-chloroanilide; aromatic carbon, nitrogen and carbon-bound chlorine all petrochemical; 0 / 395.2 = 0.00.
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

Diazotised 4-chloro-2-nitroaniline is coupled with acetoacet-2-chloroanilide, both made from petrochemical benzene derivatives. No natural-origin route exists.

In plain English

A synthetic yellow azo pigment, listed on ingredient labels as CI 11710, used to colour products. It is made by coupling two petrochemical aromatic compounds and gives a greenish-yellow shade.

CosIng definition: Pigment Yellow 3 is classed chemically as a monoazo color. It conforms to the formula (To identify the colorant allowed for use in the European Union (EU), the INCI Name CI 11710 must be used, except for hair dye products).

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Structure

2D structure of Pigment Yellow 3

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

PubChem CID 94326 ↗

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 3. PubChem CID 94326. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3PIGMENT YELLOW 3. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4PIGMENT YELLOW 3. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=PIGMENT%20YELLOW%203