Database/Colorant/CI 16185
Mostly natural · ISO 16128

Is CI 16185 natural?

Mostly. Trisulfonated synthetic azo dye; sulfonate/sodium mass slightly exceeds the petrochemical aromatic backbone under the site's mineral-counter-ion convention.

INCI nameCI 16185
CAS915-67-3
FormulaC20H11N2Na3O10S3 · 604.5 Da
FunctionColorant
FeedstockA trisodium naphthalene-trisulfonate azo dye made from petrochemical…

How we scored it

MW 604.5: 3xSO3Na=3x103.06=309.18 mineral-natural; remaining trisulfonated naphthalene-diazo-naphthol backbone 295.32 petrochemical -> 309.18/604.5=0.51.
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 trisodium naphthalene-trisulfonate azo dye made from petrochemical naphthalenesulfonic acid intermediates. No natural route exists; the result is driven by the mass of the sulfonate salt groups.

In plain English

A synthetic red-orange azo colorant used in cosmetics, made from petrochemical naphthalene chemicals carrying three sulfonate salt groups. It is a man-made dye despite the mineral portion of its weight.

CosIng definition: CI 16185 is classed chemically as a monoazo colour. It conforms to the formula:

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Structure

2D structure of CI 16185

trisodium;3-hydroxy-4-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-2,7-disulfonate

PubChem CID 13506 ↗

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 16185. PubChem CID 13506. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 16185. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 16185. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2016185