The new 7-nitro-2,1,3-benzoxadiazole compounds and
7-nitro-2,1,3-benzthiadiazole compounds of formula (I) are:
##STR1##
Dyeing agents for keratin fibers containing these compounds and methods of
dyeing hair with the dyeing agents are described.
Os compostos 7-nitro-2,1,3-benzoxadiazole novos e os compostos 7-nitro-2,1,3-benzthiadiazole da fórmula (I) são: ## do ## STR1 Os agentes tingindo-se para as fibras do keratin que contêm estes compostos e métodos de tingir o cabelo com os agentes tingindo-se são descritos.