DIFF Subgroup
C09B 43/42 by substituting radicals containing hetero atoms for —CN radicals
Introduced: January 1980
Full Title
Preparation of azo dyes from other azo compounds > by substituting hetero atoms by radicals containing other hetero atoms > by substituting radicals containing hetero atoms for —CN radicals
No child classifications to compare. This is a leaf node in both IPC and CPC.