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2-Nitro-p-phenylenediamine is a low molecular weight red dye which is able to penetrate into hair shafts; this compound is one of the most commonly used dyes in semi-permanent hair colorants. 2-Nitro-p-phenylenediamine is also an ingredient in perman...
2-Nitro-p-phenylenediamine is a low molecular weight red dye which is able to penetrate into hair shafts; this compound is one of the most commonly used dyes in semi-permanent hair colorants. 2-Nitro-p-phenylenediamine is also an ingredient in perman...