I provide Chiajiniumu dye - [challenge] pyrido. A process for dyeing keratin-containing fibers, was the [SOLUTION] disclosed the following formula at least one of the fibers: [Formula 1] Wherein, independently of one another, hydrogen 3, R 4 R 1, R 2, R is hydroxy group -S-H group, no -S- carbon atoms alkyl of 1 to 12 halogen atom carbon atoms 1 to carbon atoms or C 1 alkyl group having 12 to carbon atoms one or more one alkyl group of 5, carbon atoms 1 to (These alkoxy group 5 12 alkoxy, . hydroxy group, or - (CO) -H group - - (CO)) carbon atoms 1 to be substituted by alkyl groups of 5 - 2 group -NO NR 5 R 6 group-(CO) H group or (CO) - carbon atoms alkyl of 1 to 5 C 6 carbon atoms 12 aryl, C 6 carbon atoms and aryl - 12 carbon atoms 1 to C 6 carbon atoms or an alkyl group of 4 to 12 The aryl - carbon atoms alkoxy of 1 to 4 groups in (these carbon atoms 1 or more one alkyl group of 5, carbon atoms alkoxy of 1 to 5 and the aryl moiety, - . or (CO) -H group is - (CO) - represents a) carbon atoms 1 to be substituted by alkyl groups of 5, independently of one another, R 6 and R 5 is a hydrogen atom hydroxy group carbon atoms is C 1 to 12 alkyl hydroxy - carbon atoms alkyl of 1 to 12-(CO) -H group-and (CO) - carbon atoms alkyl of 1 to 5 phenyl or phenyl - carbon atoms is C 1 to radical (These carbon atoms 1 or more one alkyl group of 5, carbon atoms alkoxy of 1 to 5, a halogen atom, a phenyl moiety, -NH 2 alkyl groups of 5 group, a mono - carbon atoms alkylamino of 1 to 5, di -. carbon atoms 1 to represent a) which may be substituted alkylamino group 5, 2 group -NO, the carboxy or hydroxy group, An is an anion I represent. It is a method comprising treating with a compound represented by. Furthermore, heterocyclic compounds novel, the composition containing other dyes in particular, and the present invention relates to applications for the hair dyeing, and a process for their preparation. None [Selection Figure]【課題】ピリド-チアジニウム染料を提供する。【解決手段】開示されたのは、ケラチン含有繊維を染色する方法であって、該繊維
