DIFF Subgroup
C09B 44/12 having one nitrogen atom as the only ring hetero atom
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 one nitrogen atom as the only ring hetero atom
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
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