DIFF Subgroup
C09B 44/18 having three nitrogen atoms as the only ring hetero atoms
Introduced: January 1980
Full Title
Azo dyes containing onium groups > containing cyclammonium groups attached to an azo group by a carbon atom of the ring system > having three nitrogen atoms as the only ring hetero atoms
No child classifications to compare. This is a leaf node in both IPC and CPC.