INCI name

O-AMINOPHENOL

o-Aminophenol

Hair dyeingreviewed

An aromatic amine listed as a hair-dyeing ingredient and linked to an Annex II entry.

What it is

o-Aminophenol (2-aminophenol) is an aromatic compound with an amino group and a hydroxyl group next to each other on a benzene ring; as a dye it has the Colour Index number CI 76520. CosIng lists it as a hair-dyeing ingredient. The EU data link this ingredient to an entry in Annex II (prohibited substances).

Where it is used

Appears on the ingredient lists of a small number of products.

Limits of interpretation

The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.

See the EU regulation section for what the Annex II entry covers and how it applies.

Functions

Hair dyeing
Imparting color to hair. Hair dyeing preparations may be temporary, semi-permanent, permanent, depending on the length of time the colorant remains on the hair.

EU regulation

EU · Annex II, entry 13722-aminophenol [1]; bis(2-hydroxyanilinium) sulfate [2]; 2-Aminophenol Hydrochloride [3]
As of
3 November 2026 · (EC) 2013/344

Safety Gate alerts (EU)

1 alerts about dangerous cosmetics in the EU mention this substance. An alert concerns a specific product, usually one that breaks EU rules.

See all alerts →

Products with this ingredient (1)

Check a full ingredient list