Database/Colorant/Pigment Yellow 1
100% petroleum · ISO 16128

Is Pigment Yellow 1 natural?

No. 4-Methyl-2-nitroaniline and acetoacetanilide derive from petrochemical toluene, benzene and acetic chemistry, and the pigment has no mineral counter-ion.

INCI namePigment Yellow 1
CAS2512-29-0
FormulaC17H16N4O4 · 340.33 Da
FunctionColorant
FeedstockDominant route diazotises 4-methyl-2-nitroaniline and couples it with…

How we scored it

C17H16N4O4 = 340.3 Da; metal-free monoazo arylide pigment, every atom from petrochemical aromatics (4-methyl-2-nitroaniline, acetoacetanilide), no mineral counter-ion: 0/340.3 = 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 diazotises 4-methyl-2-nitroaniline and couples it with acetoacetanilide, all petrochemical aromatics. No natural-origin route exists.

In plain English

A synthetic yellow organic pigment (a monoazo Hansa yellow) used to colour products. It is made entirely from petrochemical aromatic chemicals, a nitrotoluidine and acetoacetanilide, with no mineral part.

CosIng definition: Pigment Yellow 1 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 11680 must be used, except for hair dye product)

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Structure

2D structure of Pigment Yellow 1

2-[(4-methyl-2-nitrophenyl)diazenyl]-3-oxo-N-phenylbutanamide

PubChem CID 221491 ↗

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 1. PubChem CID 221491. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3PIGMENT YELLOW 1. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4PIGMENT YELLOW 1. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=PIGMENT%20YELLOW%201