Database/Colorant/CI 20470
Mostly petroleum · ISO 16128

Is CI 20470 natural?

Mostly not. Naphthalenesulfonate/phenylazo backbone from petrochemical aromatic intermediates (n=0); two sodium sulfonate groups counted as mineral natural fragments (n=1).

INCI nameCI 20470
CAS1064-48-8
FormulaC22H14N6Na2O9S2 · 616.5 Da
FunctionColorant
FeedstockCI 20470 is manufactured by diazotising a nitroaniline…

How we scored it

MW 616.5: 2x SO3Na (sulfonate+Na, natural) = 206 Da; naphthalene/phenyl/diazo/nitro/amino backbone (coal-tar aromatics) = 410 Da → 206/616.5 = 0.33
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

CI 20470 is manufactured by diazotising a nitroaniline and coupling it to an aminonaphthalene disulfonic acid, both derived from petrochemical/coal-tar aromatics. There is no natural-extraction route for this synthetic azo dye.

In plain English

A synthetic orange-red azo dye used to colour cosmetics. It's built from coal-tar-derived aromatic chemicals, though the sodium sulfonate groups that help it dissolve in water come from mineral sulfonation.

CosIng definition: CI 20470 is classed chemically as a disazo colour. It conforms to the formula:

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Structure

2D structure of CI 20470

disodium;4-amino-5-hydroxy-3-[(4-nitrophenyl)diazenyl]-6-phenyldiazenylnaphthalene-2,7-disulfonate

PubChem CID 135442942 ↗

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. 2CI 20470. PubChem CID 135442942. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 20470. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 20470. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2020470