Database/Hair Dyeing/o-Aminophenol Sulfate
Mostly petroleum · ISO 16128

Is o-Aminophenol Sulfate natural?

Mostly not. 2-Aminophenol is a synthetic phenol/aniline derivative from petrochemical benzene; only the sulfate counter-ion counts as mineral natural origin.

INCI nameo-Aminophenol Sulfate
CAS67845-79-8
FormulaC12H16N2O6S · 316.33 Da
FunctionHair Dyeing
FeedstockManufactured by nitrating and reducing phenol to give…

How we scored it

Salt of 2x 2-aminophenol (petrochemical phenol derivative, 218 Da) + sulfate (96 Da, natural mineral fragment). 96/316.3 = 0.30.
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 nitrating and reducing phenol to give 2-aminophenol, then forming the sulfate salt for stability. There is no natural-origin route to this synthetic dye intermediate.

In plain English

A hair-dye ingredient that reacts with other dye components to form colour inside the hair shaft. It is a synthetic phenol-derived compound, stabilised as a sulfate salt.

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 o-Aminophenol Sulfate

bis(2-aminophenol);sulfuric acid

PubChem CID 91658960 ↗

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. 2o-Aminophenol Sulfate. PubChem CID 91658960. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3O-AMINOPHENOL SULFATE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4O-AMINOPHENOL SULFATE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=O-AMINOPHENOL%20SULFATE