Database/Colorant/CI 61585
Mostly petroleum · ISO 16128

Is CI 61585 natural?

Mostly not. Synthetic anthraquinone colorant supplied as its sodium sulfonate salt. The sulfonate groups and sodium ions count as natural under the site's counter-ion convention; every carbon in the dye is petrochemical.

INCI nameCI 61585
CAS4474-24-2
FormulaC32H28N2Na2O8S2 · 678.7 Da
FunctionColorant
FeedstockPetrochemical aromatic intermediates coupled into the dye, sulfonated…

How we scored it

CI 61585 C32H28N2Na2O8S2 678.7 Da: 2×SO3 160.1 Da + 2×Na 46.0 Da are mineral-derived (natural) = 206.1 Da; the anthraquinone chromophore 472.6 Da is petrochemical → 206.1/678.7 = 0.30. Same counter-ion convention as CI 16185 and the site's other sulfonated colorants.
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 aromatic intermediates coupled into the dye, sulfonated with sulfur trioxide and isolated as the sodium salt.

In plain English

A synthetic blue colourant used in cosmetic formulas, made entirely from man-made aromatic chemicals rather than from plants or minerals.

CosIng definition: CI 61585 is classed chemically as an anthraquinone colour. It conforms to the formula:

Natural alternatives with the same function

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Structure

2D structure of CI 61585

disodium;3-[[9,10-dioxo-4-(2,4,6-trimethyl-3-sulfonatoanilino)anthracen-1-yl]amino]-2,4,6-trimethylbenzenesulfonate

PubChem CID 20551 ↗

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 61585. PubChem CID 20551. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 61585. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 61585. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2061585