Preparation of azo dyes from other azo compounds

Classification Context

Section:

CHEMISTRY; METALLURGY

Class:

DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR

Subclass:

ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; MORDANTS; LAKES

Child Classifications

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• C09B 43/02 by sulfonation
• C09B 43/04 by nitration
• C09B 43/06 by oxidation
• C09B 43/08 by reduction
• C09B 43/11 by introducing hydrocarbon radicals or substituted hydrocarbon radicals on primary or secondary amino groups
• C09B 43/12 by acylation of amino groups
• C09B 43/18 by acylation of hydroxy groups
• C09B 43/28 by etherification of hydroxy groups
• C09B 43/3 by esterification of —COOH or —SOH groups
• C09B 43/32 by reacting carboxyl or sulfonic groups, or derivatives thereof, with amines; by reacting keto groups with amines
• C09B 43/4 by substituting hetero atoms by radicals containing other hetero atoms
• C09B 43/44 by substituting amine groups for hydroxyl groups or hydroxy groups for amine groups; Desacylation of amino-acyl groups; Deaminating