Database/Hair Dyeing/HC Yellow No. 7
100% petroleum · ISO 16128

Is HC Yellow No. 7 natural?

No. Synthetic azo dye formed by diazotizing and coupling petrochemical aniline derivatives.

INCI nameHC Yellow No. 7
CAS104226-21-3
FormulaC17H22N4O2 · 314.4 Da
FunctionHair Dyeing
FeedstockManufactured by diazo-coupling petrochemical aniline derivatives, then hydroxyethylating…

How we scored it

Azo-linked diaminobenzene dye built from petrochemical aniline diazotization/coupling; no natural fragment. 0/314.4=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 diazo-coupling petrochemical aniline derivatives, then hydroxyethylating the product. No natural route exists commercially.

In plain English

A synthetic azo dye used in hair coloring products to create yellow shades. It is produced entirely from petrochemical aniline derivatives.

CosIng definition: HC Yellow No. 7 is the hair color that conforms to the formula

Natural alternatives with the same function

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A plant extract from the henna shrub, used to condition hair and skin and add a reddish tint.…

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A hair-dye ingredient traditionally made by heating gallic acid, itself extracted from plant tannins in gallnuts, until it…

Structure

2D structure of HC Yellow No. 7

2-[4-[(4-aminophenyl)diazenyl]-N-(2-hydroxyethyl)-3-methylanilino]ethanol

PubChem CID 163730 ↗

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. 7. PubChem CID 163730. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3HC YELLOW NO. 7. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4HC YELLOW NO. 7. 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.%207