Database/Colorant/CI 24790
Mostly petroleum · ISO 16128

Is CI 24790 natural?

Mostly not. Disazo dye on a cyclohexyl-bridged diphenyl/naphthalenesulfonate core; only the two Na-paired sulfonates count as natural, the rest is coal-tar aromatic chemistry.

INCI nameCI 24790
CAS13421-53-9
FormulaC44H34N4Na2O12S3 · 952.9 Da
FunctionColorant
FeedstockA complex synthetic disazo dye built from petrochemical…

How we scored it

MW 952.9, 3 S/2 Na: ~2x SO3Na (natural, ~206 Da); 1x benzenesulfonyloxy ester S (petrochemical, esterified not a salt) + cyclohexyl/naphthalene/phenyl diazo core (petrochemical) → ~206/952.9 ≈ 0.22; source IUPAC truncated
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

A complex synthetic disazo dye built from petrochemical aromatic amines and naphtholsulfonic acid intermediates, coupled and partly esterified with benzenesulfonic acid. No natural-extraction route exists.

In plain English

A synthetic disazo dye used to colour cosmetic products, built from coal-tar-type aromatic chemicals joined with sulfonate and ester groups. Only the small sodium-sulfonate portion is mineral-derived; the rest is synthetic.

CosIng definition: CI 24790 is classed chemically as a disazo colour. It conforms to the formula:

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Structure

2D structure of CI 24790

disodium;3-[[4-[1-[4-[[7-(benzenesulfonyloxy)-1-hydroxy-3-sulfonatonaphthalen-2-yl]diazenyl]phenyl]cyclohexyl]phenyl]diazenyl]-4,6-dihydroxynaphthalene-2-sulfonate

PubChem CID 3014733 ↗

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 24790. PubChem CID 3014733. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 24790. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 24790. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2024790