CPC Main Group
C09B 33/00 Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
2 direct subcodes
Child Classifications
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- C09B 33/02 Disazo dyes
- C09B 33/18 Trisazo or higher polyazo dyes