Database/Hair Dyeing/2,4-Diaminophenol HCl
Mostly petroleum · ISO 16128

Is 2,4-Diaminophenol HCl natural?

Mostly not. The diaminophenol core is a petrochemical aniline/phenol derivative; only the chloride counter-ions are mineral-origin natural mass.

INCI name2,4-Diaminophenol HCl
CAS137-09-7
FormulaC6H10Cl2N2O · 197.06 Da
FunctionHair Dyeing
FeedstockThe organic core is synthesised from petrochemical phenol/aniline…

How we scored it

Free base C6H8N2O (124Da) petrochemical aromatic amine; 2 HCl (73Da) natural mineral chloride -> 73/197 = 0.37
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

The organic core is synthesised from petrochemical phenol/aniline precursors and isolated as the dihydrochloride salt using mineral hydrochloric acid. No natural route exists for the amine core.

In plain English

A synthetic hair-dye ingredient made from petroleum-derived phenol, sold as a stable salt form, used to develop colour in permanent hair dyes.

Natural alternatives with the same function

Beta Vulgaris Root Powder 100% natural origin

A powder made by drying and grinding sugar beet root. Used as a natural colorant for hair dye…

 Bismuth Citrate 100% natural origin

A salt formed from bismuth metal and citric acid, a natural fermentation-derived fruit acid, used to buffer, chelate…

 Dihydroxyacetone 100% natural origin

The active self-tanning ingredient that reacts with skin's surface proteins to produce a temporary bronze colour; made by…

 Epicatechin 100% natural origin

An antioxidant compound naturally found in tea and cocoa, used in skin, hair and oral care. It's extracted…

 Lawsonia Inermis Extract 100% natural origin

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

 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 2,4-Diaminophenol HCl

2,4-diaminophenol;dihydrochloride

PubChem CID 8715 ↗

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. 22,4-Diaminophenol HCl. PubChem CID 8715. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 32,4-DIAMINOPHENOL HCL. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 42,4-DIAMINOPHENOL HCL. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=2%2C4-DIAMINOPHENOL%20HCL