INCI name

4-CHLORORESORCINOL

4-Chlororesorcinol

Hair dyeingreviewed

A chlorinated resorcinol derivative used in oxidative hair dyes.

What it is

4-Chlororesorcinol (4-chlorobenzene-1,3-diol) is a derivative of resorcinol carrying a chlorine atom. CosIng lists it as a hair-dyeing ingredient.

Where it is used

Found in permanent (oxidative) hair colours.

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.

Its position on the list does not show the final shade, which depends on the combination of dyes in the product.

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 III, entry 1991,3-Benzenediol, 4-Chlororesorcinol
Product type
Hair dye substance in oxidative hair dye products
Conditions and warnings
To be printed on the label: Hair colorants can cause severe allergic reactions.
As of
3 November 2026 · (EU) 2013/658

Products with this ingredient (13)

Check a full ingredient list