CPC Subgroup
C09B 43/18 by acylation of hydroxyl group
Full Title
Preparation of azo dyes from other azo compounds > by acylation of hydroxyl group
3 direct subcodes
Child Classifications
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- C09B 43/20 with monocarboxylic acids, carbamic acid esters or halides, mono- isocyanates or haloformic acid esters
- C09B 43/24 with formation of —O—SO2—R or —O—SO3H radicals
- C09B 43/26 with polyfunctional acylating agents