from coupling components containing a reactive methylene group

Introduced: September 1968

Full Title

Monoazo dyes prepared by diazotising and coupling > from coupling components containing a reactive methylene group

CPC subdivides this area 3x more granularly than IPC with 2 additional codes.

2 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

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C09B 29/322 CPC only CPC only
C09B 29/325 +1 CPC CPC only CPC only
C09B 29/33 Aceto- or benzoylacetylarylides since 1980 +2 CPC IPC+CPC Available in IPC and CPC