Anthraquinone hair dyes having a quaternary ammonium side chain

Details Anthraquinone hair dyes having a quaternary ammonium side chain Anthraquinone hair dyes having a quaternary ammonium side chain

C - Chemistry, Metallurgy

09

B

C09B 1/28 (2006.01) C07C 225/34 (2006.01) C07D 295/13 (2006.01)

Patent

CA 2175542

Anthraquinone compounds of formula I Image wherein R1 and R2 are methyl and R3 is propyl, or R1 and R2 are ethyl and R3 is methyl and A- is a cosmetically acceptable anion, are useful for the dyeing of hair. Compounds of formula I may advantageously be employed with direct dyes. Compositions and a method of use employing same are disclosed.

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