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PCE
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CPC Subgroup
C09B 33/04

in which the coupling component is a dihydroxy or polyhydroxy compound

Full Title

Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling > Disazo dyes > in which the coupling component is a dihydroxy or polyhydroxy compound

4 direct subcodes

Child Classifications

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  • C09B 33/044 the coupling component being a bis-phenol
  • C09B 33/048 the coupling component being a bis-naphthol
  • C09B 33/052 the coupling component being a bis-(naphthol-amine)
  • C09B 33/056 the coupling component being a bis-(naphthol-urea)