Database/Hair Dyeing/HC Red No. 9
100% petroleum · ISO 16128

Is HC Red No. 9 natural?

No. Chlorinated aminophenyl quinone-imine urea dye built via synthetic chlorination and amination of petrochemical aromatic intermediates; the chlorine is covalently bonded, not a natural salt.

INCI nameHC Red No. 9
CAS56330-88-2
FormulaC15H15ClN4O2 · 318.76 Da
FunctionHair Dyeing
FeedstockHC Red No. 9 is synthesised from petrochemical…

How we scored it

C15H15ClN4O2 quinone-imine/urea dye; chloro is a covalent aryl substituent from synthetic chlorination, not a mineral counter-ion. Entire molecule petrochemical. 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

HC Red No. 9 is synthesised from petrochemical aromatic amine and urea intermediates with a chlorination step. No natural-origin production route exists.

In plain English

A synthetic red-brown dye for direct hair coloring. It's manufactured through several chemical synthesis steps from petroleum-derived aromatic chemicals, including a chlorination reaction; nothing in it comes from plants.

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Structure

2D structure of HC Red No. 9

[6-[3-chloro-4-(methylamino)phenyl]imino-4-methyl-3-oxocyclohexa-1,4-dien-1-yl]urea

PubChem CID 91809 ↗

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. 2HC Red No. 9. PubChem CID 91809. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3HC RED NO. 9. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4HC RED NO. 9. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=HC%20RED%20NO.%209