| 摘要 |
PROBLEM TO BE SOLVED: To provide a hair-dyeing agent composition, having astonishingly good hair-coloring property and compatibility to hydrogen peroxide, by which bright color which is stable to hair washing and environmental influence and is retained for a long period can be realized. SOLUTION: This hair-dyeing agent composition comprises a condensed heterocyclic direct dye represented by the general formula (1) [B represents a heterocyclic group having a structure such as a pyrazolotriazole structure, a imidazoloazole structure or a pyrroloazole structure; R<2> and R<3> are each hydrogen atom, a 1-5C alkyl group, an acylamino group, an alkylsulfonylamino group or an electron-attracting group] or its salt.
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