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N-PHENYL-P-PHENYLENEDIAMINE SULFATE

Description

N-Phenyl-p-phenylenediamine sulfate is a potent oxidative hair dye ingredient primarily used in professional and at-home hair coloring products. This synthetic compound belongs to the para-phenylenediamine (PPD) family, known for its excellent color-depositing properties and longevity. It is particularly effective in creating dark shades, ranging from deep browns to blacks, and is often combined with other dye precursors to achieve a wide spectrum of hair colors.

The compound works by penetrating the hair shaft and reacting with hydrogen peroxide to form larger, colored molecules that become trapped within the cortex. This process results in a permanent color change that resists fading and washing. N-Phenyl-p-phenylenediamine sulfate offers superior gray coverage and produces rich, vibrant hues that last significantly longer than temporary or semi-permanent dyes.

While effective, this ingredient can cause allergic reactions in some individuals, necessitating patch tests before use. It is regulated in many countries due to its potential sensitizing properties. Formulators must adhere to concentration limits and usage guidelines set by regulatory bodies to ensure product safety. When properly formulated and used as directed, N-Phenyl-p-phenylenediamine sulfate remains a cornerstone ingredient in the hair coloring industry.