Patent ID: 7166711

Claim:
A composition for dyeing hair comprising a cationic dye of formula (1) wherein R 1 and R 7 are each independently of the other hydrogen, hydroxyl; unsubstituted or substituted C 1 –C 6 alkyl, an aryl radical or C 1 –C 6 alkoxy; or —NR 3 R 4 , wherein R 3 and R 4 are each independently of the other hydrogen, an unsubstituted or substituted aryl radical or C 1 –C 6 alkyl, and R 2 is hydrogen, hydroxyl, unsubstituted or substituted C 1 –C 6 alkyl, an aryl radical or C 1 –C 6 alkoxy, —NR 3 R 4 , or an organic radical of formula (2) wherein R 5 is hydrogen, an unsubstituted or substituted aryl radical or C 1 –C 6 alkyl, and X − is an anion.