Database/Colorant/CI 18965
Mostly petroleum · ISO 16128

Is CI 18965 natural?

Mostly not. Only the two sodium counter-ions are natural; the dichloro-pyrazolone-sulfonate azo dye backbone is synthetic petrochemical.

INCI nameCI 18965
CAS6359-98-4
FormulaC16H10Cl2N4Na2O7S2 · 551.3 Da
FunctionColorant
FeedstockCI 18965 is a synthetic disodium pyrazolone monoazo…

How we scored it

Disodium dichloro-pyrazolone-sulfonatophenyl-diazenyl-benzenesulfonate: 2 Na = 45.98 Da / MW 551.3 Da = 0.083 natural (counter-ions only); the dichlorobenzenesulfonate-pyrazolone-azo backbone is petrochemical.
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 18965 is a synthetic disodium pyrazolone monoazo dye built from dichlorobenzenesulfonic acid and a sulfonatophenyl-pyrazolone, both petrochemical aromatic/heterocyclic intermediates. Only the two sodium counter-ions (about 8% of molecular mass) are natural-origin.

In plain English

A synthetic yellow-orange azo dye, sold as its sodium salt, used to colour cosmetics. Almost entirely petroleum-derived; only a small mineral salt portion counts as natural.

CosIng definition: CI 18965 is classed chemically as a monoazo colour. It conforms to the formula:

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Structure

2D structure of CI 18965

disodium;2,5-dichloro-4-[3-methyl-5-oxo-4-[(4-sulfonatophenyl)diazenyl]-4H-pyrazol-1-yl]benzenesulfonate

PubChem CID 22842 ↗

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 18965. PubChem CID 22842. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 18965. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 18965. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2018965