Database/Hair Dyeing/Basic Yellow 57
Mostly petroleum · ISO 16128

Is Basic Yellow 57 natural?

Mostly not. Synthetic pyrazolone azo trimethylammonium hair dye supplied as a salt. Only the chloride counter-ion counts as natural origin under the site's mineral counter-ion convention; every carbon in the coloured cation is petrochemical.

INCI nameBasic Yellow 57
CAS68391-31-1
FormulaC19H22ClN5O · 371.9 Da
FunctionHair Dyeing
FeedstockPetrochemical aromatic amines and couplers assembled into the…

How we scored it

Basic Yellow 57 C19H22ClN5O 371.9 Da: chloride counter-ion Cl 35.5 Da is mineral-derived (natural); the pyrazolone azo trimethylammonium dye cation 336.4 Da is built entirely from petrochemical aromatic intermediates → 35.5/371.9 = 0.10.
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

Petrochemical aromatic amines and couplers assembled into the dye cation, isolated as its salt.

In plain English

A synthetic yellow dye used in hair colouring products. Its full chemical structure is known, and every part of it comes from petrochemical raw materials.

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Structure

2D structure of Basic Yellow 57

trimethyl-[3-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]phenyl]azanium chloride

PubChem CID 94631 ↗

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. 2Basic Yellow 57. PubChem CID 94631. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3BASIC YELLOW 57. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4BASIC YELLOW 57. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=BASIC%20YELLOW%2057