N,N'-bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine

N,N'-Bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine (CAS 84041-77-0) is a nitro-based aminophenol dye intermediate used primarily in oxidative and direct hair coloring systems. In cosmetic formulations, it delivers semi-permanent violet and red-violet shades with reliable color deposit on treated and natural hair fibers. In hair color products, it functions as a direct dye.

It deposits color without requiring an oxidative developer and is commonly blended with other nitro dyes to achieve targeted shade ranges. Textile dyeing operations use it to color protein-based fibers. This includes materials such as wool and silk, where its affinity for amino-containing substrates supports even uptake. Leather finishing formulators incorporate it into dye baths for consistent surface coloration.

In specialty paper applications, it contributes to surface tinting where controlled, uniform color application is required. This dye is supplied as a solid powder, typically in dark-colored crystalline form. Cosmetic-grade material is the primary commercial specification, with purity levels aligned to EU and international cosmetic ingredient standards. Bulk quantities are available for industrial textile applications.

Technical-grade supply is standard for leather applications. The material is handled according to standard chemical safety protocols to ensure stability and performance in diverse manufacturing environments.