Back to Ingredient Dictionary

4-CHLORORESORCINOL

Description

4-Chlororesorcinol is a potent hair dye precursor and antioxidant commonly used in professional hair coloring products. This synthetic compound is derived from resorcinol, with the addition of a chlorine atom, enhancing its stability and efficacy. In hair dye formulations, 4-chlororesorcinol acts as a coupling agent, reacting with oxidative developers to produce vibrant, long-lasting color results.

The ingredient's primary function is to facilitate the development of dark shades, particularly in brown and black hair dyes. It contributes to improved color penetration and fastness, resulting in more uniform and intense coloration. 4-Chlororesorcinol also exhibits antioxidant properties, which can help protect hair fibers from oxidative stress during the coloring process.

While effective, 4-chlororesorcinol requires careful handling and formulation due to its potential for skin sensitization. It is typically used in concentrations ranging from 0.5% to 2.5% in hair dye products. Regulatory bodies, including the European Commission's Scientific Committee on Consumer Safety, have assessed its safety for use in oxidative hair dye formulations when applied according to recommended guidelines. As with all hair dye ingredients, patch testing is advised to check for individual sensitivities before use.