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N,N'-BIS(2-HYDROXYETHYL)-2-NITRO-P-PHENYLENEDIAMINE

Description

N,N'-Bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine is a synthetic hair dye ingredient widely used in the cosmetic industry for its vibrant color-imparting properties. This compound belongs to the family of para-phenylenediamine (PPD) derivatives and is primarily employed in semi-permanent and permanent hair coloring formulations.

The molecule features a nitro group and two hydroxyethyl substituents, which contribute to its unique dyeing characteristics. It typically produces warm, reddish-brown to copper tones when applied to hair. The compound works by penetrating the hair shaft and reacting with other dye precursors in the presence of an oxidizing agent, forming larger color molecules that remain trapped within the hair structure.

While effective for coloring, N,N'-Bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine may cause allergic reactions in some individuals, particularly those sensitive to PPD-based dyes. As with all hair dyes, patch testing is recommended before use. The ingredient is subject to concentration restrictions in many countries to ensure consumer safety. When used as directed in approved formulations, it provides long-lasting color results with good wash fastness and fade resistance.