| abstract |
A hair dye composition comprising an azo dye (1): (1) (wherein R1 to R4 represent H, an aliphatic hydrocarbon group, an aryl group, a halogen atom, an acyl group, a cyano group, an acylamino group or the like, and R1 and R2, and/or R3 and R4 may be linked to form a 5- or 6-membered ring; X represents C or N, and when X is C, n is 1 and when X is N, n is 0; A1, A2, A3 and A4 represent N, or C having substituted Y in the formula or H, among which at least one is a nitrogen atom; Y represents a substituent; and m represents an integer of 0 to 3) or a salt thereof. |