Back to Ingredient Dictionary

O-AMINOPHENOL

Description

O-Aminophenol is a versatile compound widely used in the hair coloring industry. This aromatic organic compound, also known as 2-aminophenol, serves as a crucial precursor in the production of various hair dyes and colorants. Its chemical structure consists of an amino group and a hydroxyl group attached to a benzene ring, providing it with unique properties ideal for hair coloration processes.

In hair dye formulations, o-aminophenol acts as a coupling agent, reacting with oxidizing agents to produce vibrant and long-lasting color molecules. It is particularly effective in creating warm brown and reddish tones. The compound's ability to penetrate the hair shaft and form stable color complexes contributes to its efficacy in permanent hair coloring products.

While o-aminophenol offers excellent color payoff and stability, formulators must consider its potential for skin sensitization. Proper concentration levels and combination with other ingredients are essential to minimize irritation risks. Additionally, o-aminophenol's use is regulated in many countries, with specific concentration limits set for hair dye products to ensure consumer safety. When used appropriately, o-aminophenol remains a valuable ingredient in achieving desired hair color results.