| abstract |
(57) [Summary] [Purpose] It has good solubility in water, water / alcohol mixtures, and more generally in conventional dyeing carriers, and is suitable for washing and for light, weather, sweat. A nitrobenzene dye that provides stable hair dyeing is provided. [Structure] The following formula (I): [In the formula (I), n is 0, 1 or 2, and R 1 , R 2 , R 3 and R 4 are each a hydrogen atom, straight-chain or branched C 1 A -C 4 -alkyl group or the like, Z is a linear or branched C 1 -C 4 -alkyl group or the like] 2-nitro-p-phenylenediamine substituted at the 5-position with sulfur, Or these cosmetically acceptable salts. |