DIFF Subgroup
C09B 33/04 in which the coupling component is a dihydroxy or polyhydroxy compound
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Disazo or 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
CPC:
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
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
IPC defines codes here since 1980.
Child Classifications
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- C09B 33/052 the coupling component being a bis-(naphthol-amine) since 1980 IPC+CPC Available in IPC and CPC
- C09B 33/056 the coupling component being a bis-(naphthol-urea) since 1980 IPC+CPC Available in IPC and CPC