7-Nitro-2,1,3-benzoxadiazole and 7-nitro-2,1,3-benzthiadiazole derivatives, as well dyeing agents for keratin fibers containing these compounds

   
   

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.

 
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