Database/Hair Dyeing/HC Red No. 13
Mostly petroleum · ISO 16128

Is HC Red No. 13 natural?

Mostly not. A synthetic direct hair dye; only its chloride counter-ion is of mineral origin.

INCI nameHC Red No. 13
CAS94158-13-1
FormulaC10H16ClN3O4 · 277.70 Da
FunctionHair Dyeing
FeedstockPetrochemical aromatic amines and azo intermediates, isolated as…

How we scored it

HC Red No. 13 C10H16ClN3O4 277.7 Da is a synthetic dye cation with a chloride counter-ion. The organic cation is petrochemical (aromatic amine / azo chemistry); the chloride 35.45 Da counts as natural mineral origin by this site's convention. 35.45/277.7 = 0.13.
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 amines and azo intermediates, isolated as the hydrochloride / chloride salt.

In plain English

A synthetic red hair dye sold as a stable salt form. Its core structure is built from petroleum-derived aniline chemicals; whether the small amount of added salt counts as natural is unclear, so this one needs a closer look.

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Structure

2D structure of HC Red No. 13

2-[4-amino-N-(2-hydroxyethyl)-3-nitroanilino]ethanol;hydrochloride

PubChem CID 21909552 ↗

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. 13. PubChem CID 21909552. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3HC RED NO. 13. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4HC RED NO. 13. 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.%2013