The invention concerns dyeing agents for keratinous fibers based on a developer-coupler combination, characterized in that they contain at least a 3-aminophenol derivative of formula (I) or a salt thereof, water-soluble and physiologically compatible, formula wherein: R1 represents a radical of formula (II) or a radical of formula (III), wherein: X1, X2, X3, X4 and X5 represent, independently of one another, a nitrogen or a C-R group, provided that at least one, or not more than three, of the radicals X are a nitrogen. The invention also concerns novel 3-aminophenol derivatives.
OXIDATION HAIR DYES CONTAINING 3-AMINOPHENOL DERIVATIVES, AND NOVEL 3-AMINOPHENOL DERIVATIVES.