Hair-coloring compositions comprise at least one self-coupling compound of Formula (1)
1
wherein R is a moiety selected from H, C
1-3
alkyl and C
1-3
hydroxyalkyl; R
1
is a C
1-3
alkylene radical and R
2
is selected from H and C
1-3
alkyl radicals.
染发配方包括至少一种具有
化学式(1)中的自偶合化合物,其中R是从H、C1-3烷基和C1-3羟基烷基中选择的基团;R1是C1-3烷基烷基,R2是从H和C1-3烷基基团中选择的。