Database/Hair Dyeing/p-Phenylenediamine HCl
Mostly petroleum · ISO 16128

Is p-Phenylenediamine HCl natural?

Mostly not. Synthetic hair-dye aromatic diamine supplied as its salt. Only the mineral counter-ion counts as natural, as on the site's other hair-dye salts; every carbon is petrochemical.

INCI namep-Phenylenediamine HCl
CAS624-18-0
FormulaC6H10Cl2N2 · 181.06 Da
FunctionHair Dyeing
FeedstockPetrochemical aromatic amine or dye base isolated as…

How we scored it

p-Phenylenediamine dihydrochloride C6H10Cl2N2 181.1 Da: 2×HCl 72.9 Da is mineral-derived (natural); the aromatic diamine 108.1 Da is petrochemical → 72.9/181.1 = 0.40.
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 amine or dye base isolated as its mineral-acid salt.

In plain English

A synthetic hair-dye ingredient made from petrochemical aromatic chemicals. It reacts with other dye components inside the hair shaft to develop permanent colour.

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 Pyrogallol 100% natural origin

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

Structure

2D structure of p-Phenylenediamine HCl

benzene-1,4-diamine;dihydrochloride

PubChem CID 12205 ↗

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. 2p-Phenylenediamine HCl. PubChem CID 12205. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3P-PHENYLENEDIAMINE HCL. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4P-PHENYLENEDIAMINE HCL. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=P-PHENYLENEDIAMINE%20HCL