Database/Hair Dyeing/HC Yellow No. 5
100% petroleum · ISO 16128

Is HC Yellow No. 5 natural?

No. Synthetic nitroaniline-ethanolamine hair dye built from petrochemical benzene and nitric acid derivatives.

INCI nameHC Yellow No. 5
CAS56932-44-6
FormulaC8H11N3O3 · 197.19 Da
FunctionHair Dyeing
FeedstockManufactured by nitration and hydroxyethylation of petrochemical phenylenediamine.…

How we scored it

Whole nitro-phenylenediamine dye from petrochemical aniline/nitration chemistry; no natural fragment. 0/197.19=0.00.
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 nitration and hydroxyethylation of petrochemical phenylenediamine. No natural route exists commercially.

In plain English

A synthetic dye used in semi-permanent hair colorants to create yellow shades. It is entirely petrochemical, made from nitroaniline derivatives.

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Structure

2D structure of HC Yellow No. 5

2-(2-amino-4-nitroanilino)ethanol

PubChem CID 3648504 ↗

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 Yellow No. 5. PubChem CID 3648504. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3HC YELLOW NO. 5. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4HC YELLOW NO. 5. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=HC%20YELLOW%20NO.%205