Database/Colorant/CI 26100
100% petroleum · ISO 16128

Is CI 26100 natural?

No. Naphthol and phenyldiazenyl-phenyl fragments both derive from petrochemical aromatic feedstocks (naphthalene, aniline).

INCI nameCI 26100
CAS85-86-9
FormulaC22H16N4O · 352.4 Da
FunctionColorant
FeedstockSynthesised from petrochemical naphthalene and aniline via diazotisation.…

How we scored it

No mineral or salt fragment present; entire molecule is a synthetic aromatic azo compound; 0.0
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 and aniline via diazotisation. No natural-isolation route exists for this dye.

In plain English

A fully synthetic dye used to colour products, built entirely from petrochemical aromatic building blocks.

CosIng definition: CI 26100 is classed chemically as a disazo colour. It conforms to the formula:

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Structure

2D structure of CI 26100

1-[(4-phenyldiazenylphenyl)diazenyl]naphthalen-2-ol

PubChem CID 62331 ↗

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 26100. PubChem CID 62331. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CI 26100. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CI 26100. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2026100