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N,N-BIS(2-HYDROXYETHYL)-P-PHENYLENEDIAMINE SULFATE

Description

N,N-Bis(2-hydroxyethyl)-p-phenylenediamine sulfate is a potent oxidative hair dye ingredient widely used in professional and at-home hair coloring products. This synthetic compound belongs to the para-phenylenediamine (PPD) family and functions as a primary intermediate in permanent hair color formulations. When combined with an oxidizing agent, typically hydrogen peroxide, it penetrates the hair shaft and undergoes a complex chemical reaction to produce long-lasting color molecules.

The ingredient is particularly effective in covering gray hair and creating dark shades, ranging from brown to black. Its molecular structure allows for excellent dye uptake and color retention, resulting in vibrant and durable hair color. The presence of hydroxyethyl groups enhances its solubility and reduces potential skin irritation compared to traditional PPD.

However, as with other oxidative hair dyes, N,N-Bis(2-hydroxyethyl)-p-phenylenediamine sulfate can cause allergic reactions in some individuals. Patch testing is recommended before use, and proper application techniques should be followed to minimize skin contact. This ingredient is subject to concentration limits and regulations in various countries to ensure consumer safety in hair coloring products.