Database/Colorant/CI 18130
Mostly petroleum · ISO 16128

Is CI 18130 natural?

Mostly not. Sulfonate-sodium groups count as mineral-derived; the naphthalene-azo-sulfonamide backbone is entirely petrochemical aromatic chemistry.

INCI nameCI 18130
CAS10236-37-0
FormulaC30H29N3Na2O9S3 · 717.7 Da
FunctionColorant
FeedstockSynthesised from petrochemical naphthalene, aniline and toluenesulfonamide precursors…

How we scored it

2x SO3Na (mineral sulfonate) 206.10 Da natural + naphthalene/cyclohexyl-tolyl-sulfonamide backbone 511.6 Da petrochemical; 206.10/717.7=0.29
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

Synthesised from petrochemical naphthalene, aniline and toluenesulfonamide precursors via diazotisation, then neutralised with sodium. No natural-isolation route exists.

In plain English

A synthetic dye used to colour cosmetics. Built from petrochemical aromatic and cyclohexyl building blocks, with mineral-derived sulfonate salt groups.

CosIng definition: CI 18130 is classed chemically as a monoazo colour. It conforms to the formula:

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Structure

2D structure of CI 18130

disodium;3-[(4-cyclohexyl-2-methylphenyl)diazenyl]-4-hydroxy-5-[(4-methylphenyl)sulfonylamino]naphthalene-2,7-disulfonate

PubChem CID 136666673 ↗

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 18130. PubChem CID 136666673. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 18130. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 18130. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2018130