4-Hydroxyindole
A cosmetic ingredient used as hair dyeing in skincare, haircare, and personal-care products sold in the European Union.
What is it?
4-hydroxyindole
What does it do?
4-Hydroxyindole is listed in the EU cosmetic ingredient inventory with the following declared functions:
-
Hair dyeing
colours hair, either by depositing pigment on the surface or by chemically altering the hair's natural pigment
EU regulatory status
This ingredient is banned in the European Union.
4-Hydroxyindole is listed under Annex II of EU Cosmetics Regulation 1223/2009 (entry 1220), making it prohibited in cosmetic products placed on the EU market.
Frequently asked questions
What is 4-Hydroxyindole?
4-Hydroxyindole is a cosmetic ingredient catalogued in the EU CosIng database. 4-hydroxyindole
Is 4-Hydroxyindole allowed in cosmetics in the EU?
No. 4-Hydroxyindole is banned for use in cosmetic products in the EU under Annex II of Regulation 1223/2009.
What does 4-Hydroxyindole do in cosmetic products?
4-Hydroxyindole is declared in the EU cosmetic ingredient inventory with these functions: hair dyeing.
What is the CAS number of 4-Hydroxyindole?
The CAS (Chemical Abstracts Service) number for 4-Hydroxyindole is 2380-94-1.
Related ingredients
Source: EU CosIng database (European Commission). This page is derived from public-sector information published by the European Commission. · Last updated: 15/10/2010