Patent ID: 7988740

Claim:
A composition for the oxidative dyeing of keratin fibers comprising: a. at least one radical scavenger selected from pyrazolone compounds according to formula (I): wherein R 1 comprises hydrogen, substituted or unsubstituted alkyl or heteroalkyl, substituted or unsubstituted cycloalkyl or heterocycloalkyl, substituted or unsubstituted alkenyl or heteroalkenyl, substituted or unsubstituted alkynyl or heteroalkynyl, substituted or unsubstituted cycloalkenyl or heterocycloalkenyl, substituted or unsubstituted cycloalkynyl or heterocycloalkynyl, substituted or unsubstituted aryl or heteroaryl, substituted or unsubstituted alkaryl or heteroalkaryl, or substituted or unsubstituted arylkyl or heteroarylkyl; and wherein R 2 comprises —OCH 3 , —CO 2 H, —C≡CCO 2 H, —CH═CHCO 2 H, or —C≡CH; b. at least one coupler compound; and c. at least one developer compound.