| abstract |
The subject of the invention is the 2,3-diamino-5,10-dihydro-1H-pyrazolo [1,2-b] phthalazin-1-one derivatives of formula (I) or (II), as well as their addition salts, their isomers and their solvates: as well as their use for the oxidation dyeing of keratinous fibers, and in particular human keratinous fibers such as the hair. The present invention makes it possible in particular to obtain a staining of keratin fibers which is stubborn, resistant to light and to washing. |