Database/Colorant/CI 16290
Mostly natural · ISO 16128

Is CI 16290 natural?

Mostly. The naphthalene-azo dye core is synthetic/petrochemical, but the four sodium and sulfonate groups make up over half the molecule's mass.

INCI nameCI 16290
CAS5850-44-2
FormulaC20H10N2Na4O13S4 · 706.5 Da
FunctionColorant
FeedstockMade by synthetic diazotisation and coupling of petrochemical…

How we scored it

C20H10N2Na4O13S4: 4xNa 92.0 + 4xSO3 320.2 = 412.2 Da mineral; remaining naphthalene-azo-naphthol core 294.3 Da petrochemical; 412.2/706.5 = 0.58
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

Made by synthetic diazotisation and coupling of petrochemical naphthalenesulfonic acid intermediates, isolated as the tetrasodium salt.

In plain English

A synthetic azo dye built on a sulfonated naphthalene structure. Used to add colour to cosmetic products.

CosIng definition: CI 16290 is classed chemically as a monoazo colour. It conforms to the formula:

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Structure

2D structure of CI 16290

tetrasodium;7-hydroxy-8-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-1,3,6-trisulfonate

PubChem CID 22112 ↗

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 16290. PubChem CID 22112. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 16290. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 16290. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2016290