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2,4-DIAMINOPHENOL

Description

2,4-Diaminophenol is a potent hair dye ingredient known for its ability to produce deep, rich colors, particularly in the brown and black spectrum. This synthetic compound belongs to the aromatic amine family and acts as an oxidative dye precursor. When combined with a developer, typically hydrogen peroxide, it undergoes a chemical reaction that allows it to penetrate the hair shaft and create long-lasting color.

The molecule's structure, featuring two amino groups (-NH2) at the 2 and 4 positions of the phenol ring, contributes to its high reactivity and color-forming properties. This arrangement enables it to couple efficiently with other dye intermediates, resulting in a wide range of color possibilities.

While effective, 2,4-Diaminophenol requires careful handling due to its potential for skin sensitization and allergic reactions in some individuals. It is subject to regulatory limits in hair dye formulations to ensure safety. Professional colorists often prefer this ingredient for its ability to achieve intense, uniform color results, especially when covering gray hair or creating dark shades. However, it is crucial to perform patch tests before use and follow manufacturer guidelines to minimize risks.