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PCE
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DIFF Subgroup
C09B 44/02

containing ammonium groups not directly attached to an azo group

Introduced: January 1980

Full Title

Azo dyes containing onium groups > containing ammonium groups not directly attached to an azo group

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

IPC defines codes here since 1980.

Child Classifications

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  • C09B 44/04 from coupling components containing amino as the only directing group since 1980 IPC+CPC Available in IPC and CPC
  • C09B 44/06 from coupling components containing hydroxyl as the only directing group since 1980 IPC+CPC Available in IPC and CPC
  • C09B 44/08 from coupling components containing heterocyclic rings since 1980 IPC+CPC Available in IPC and CPC