4-Hydroxypropylamino-3-Nitrophenol

4-Hydroxypropylamino-3-Nitrophenol is a hair colorant. It is mainly used in semi-permanent hair colorants. 4-Hydroxypropylamino-3-Nitrophenol and the other amino nitrophenols are also used as toners in permanent hair dyes but they do not interact with oxidizers.