Database/Hair Dyeing/Disperse Black 9
100% petroleum · ISO 16128

Is Disperse Black 9 natural?

No. Azo dye built from petrochemical aniline derivatives and ethoxylated aniline; no natural-origin fragment present.

INCI nameDisperse Black 9
CAS20721-50-0
FormulaC16H20N4O2 · 300.36 Da
FunctionHair Dyeing
FeedstockManufactured by diazo-coupling a nitroaniline-derived intermediate to a…

How we scored it

Synthetic azo dye from a diazotised aminophenyl coupled to a bis-hydroxyethyl aniline; entirely petrochemical aromatics and ethylene oxide. 0% natural.
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

Manufactured by diazo-coupling a nitroaniline-derived intermediate to a bis-hydroxyethyl aniline, both synthesised from petrochemical aromatics and ethylene oxide. No fragment derives from a natural feedstock.

In plain English

A synthetic azo dye used to colour hair. It is manufactured entirely from man-made aromatic chemicals and contains no natural-origin material.

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Structure

2D structure of Disperse Black 9

2-[4-[(4-aminophenyl)diazenyl]-N-(2-hydroxyethyl)anilino]ethanol

PubChem CID 88669 ↗

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. 2Disperse Black 9. PubChem CID 88669. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3DISPERSE BLACK 9. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4DISPERSE BLACK 9. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=DISPERSE%20BLACK%209