| abstract |
The subject of the present application is a 3-aminophenol derivative of the following formula (I): [Chemical 1] [In the above formula, R1 is a residue of the following formula (II) or a residue of the following formula (III)] [Chemical formula 2] Or a keratin fiber dyeing agent containing at least one of these physiologically mild water-soluble salts, mainly composed of a combination of a developer and a coupler substance, and a novel 3-aminophenol derivative. . |