| abstract |
Provided is a hair dye composition containing a dissociative direct dye represented by the following formula (1): n n nwherein, R 1 to R 4 each represents H or substituent, X represents OH or —NHSO 2 R 5 (R 5 representing an alkyl, aryl or heterocyclic group) and A represents a group of any one of formulas (Cp-1) through (Cp-12).n n The hair dye composition of the present invention is capable of strongly dyeing the hair with a vivid color tone without causing decomposition of the dye during the dyeing process, exhibits excellent resistance against sunlight, hair washing, perspiration, friction and heat, has a high stability against an alkali agent and an oxidizing agent, has a high dyeing property, and shows less color fade over time. |