Database/Colorant/CI 18690
Mostly petroleum · ISO 16128

Is CI 18690 natural?

Mostly not. A metal-complex dye: only the chromium is of mineral origin, the organic ligands are synthetic aromatics.

INCI nameCI 18690
CAS5601-29-6
FormulaC34H25CrN8O6 · 693.6 Da
FunctionColorant
FeedstockPetrochemical azo-pyrazolone ligands complexed with chromium salts.

How we scored it

Chromium complex dye C34H25CrN8O6 693.6 Da: the chromium ion 52.0 Da counts as natural mineral origin (as copper does in the phthalocyanine pigments CI 74160 and CI 74260); the azo-pyrazolone ligands are petrochemical. 52.0/693.6 = 0.07.
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

Petrochemical azo-pyrazolone ligands complexed with chromium salts.

In plain English

A synthetic metal-complex dye used as a cosmetic colorant, where a chromium ion is bonded to two petroleum-derived dye molecules. Entirely of synthetic origin.

CosIng definition: CI 18690 is classed chemically as a monoazo colour. It is a chromium complex of the color that conforms to the formula:

Natural alternatives with the same function

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 Anthocyanins 100% natural origin

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 Calcium Ferrite 100% natural origin

A mineral pigment made of calcium and iron oxide, used as a colourant in cosmetics. It is produced…

 Calcium Stearate 100% natural origin

The calcium salt of stearic acid, a fatty acid usually from vegetable oils. Used as an anti-caking, thickening…

 Caramel 100% natural origin

A colouring and fragrance ingredient made by heating sugar, sucrose or glucose, until it browns. It comes from…

Structure

2D structure of CI 18690

chromium(3+);hydron;bis(2-[(3-methyl-5-oxo-1-phenylpyrazol-2-id-4-yl)diazenyl]benzoate)

PubChem CID 135993861 ↗

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 18690. PubChem CID 135993861. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 18690. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 18690. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2018690