CPC Main Group
C09B 31/00 Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
3 direct subcodes
Child Classifications
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- C09B 31/02 Disazo dyes
- C09B 31/16 Trisazo dyes
- C09B 31/30 Other polyazo dyes