Database/Colorant/CI 15980
Mostly petroleum · ISO 16128

Is CI 15980 natural?

Mostly not. The aromatic diazo core is petrochemical naphthalene/benzene chemistry; the two sodium sulfonate groups count as mineral natural-origin mass.

INCI nameCI 15980
CAS2347-72-0
FormulaC16H10N2Na2O7S2 · 452.4 Da
FunctionColorant
FeedstockManufactured by diazotising a sulfanilic-acid-type aromatic amine and…

How we scored it

2x SO3Na natural (sulfonate) = 206 Da; naphthalene-phenyl-diazo-OH core C16H10N2O = 246 Da petrochemical. 206/452.4 = 0.46.
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

Manufactured by diazotising a sulfanilic-acid-type aromatic amine and coupling it to a naphtholsulfonate, both petrochemical aromatics, then neutralising with sodium to the disodium salt. No natural-origin production route exists.

In plain English

A synthetic sodium-salt dye used to colour cosmetics. Most of its weight comes from a petrochemical aromatic dye structure; a smaller part is the mineral sodium-sulfonate salt groups.

CosIng definition: CI 15980 is classed chemically as a monoazo colour. It conforms to the formula:

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Structure

2D structure of CI 15980

disodium;6-hydroxy-5-[(3-sulfonatophenyl)diazenyl]naphthalene-2-sulfonate

PubChem CID 16868 ↗

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 15980. PubChem CID 16868. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 15980. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 15980. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2015980