Database/Hair Dyeing/HC Yellow No. 2
100% petroleum · ISO 16128

Is HC Yellow No. 2 natural?

No. HC Yellow No. 2 is a synthetic nitroaniline-based hair-dye molecule manufactured entirely from petrochemical aromatic feedstocks.

INCI nameHC Yellow No. 2
CAS4926-55-0
FormulaC8H10N2O3 · 182.18 Da
FunctionHair Dyeing
FeedstockHC Yellow No. 2 is manufactured by chemical…

How we scored it

Whole molecule (C8H10N2O3) is a synthetic nitroaniline dye intermediate; no natural-origin fragment = 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 Yellow No. 2 is manufactured by chemical synthesis from petrochemical aniline derivatives, forming a nitro-substituted aniline dye. No natural feedstock is involved.

In plain English

A synthetic dye used in semi-permanent hair colour products to impart a yellow shade.

CosIng definition: HC Yellow No. 2 is the hair color that conforms to the formula

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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. 2

2-(2-nitroanilino)ethanol

PubChem CID 78637 ↗

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. 2. PubChem CID 78637. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3HC YELLOW NO. 2. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4HC YELLOW NO. 2. 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.%202