CPC Subgroup
C09B 35/02 Disazo dyes
Full Title
Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling > Disazo dyes
3 direct subcodes
Child Classifications
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- C09B 35/021 characterised by two coupling components of the same type
- C09B 35/037 characterised by two coupling components of different types
- C09B 35/039 characterised by the tetrazo component