IPC Subgroup
C09B 43/28 by etherification of hydroxy groups
Introduced: January 1980
Last revised: January 2006
Full Title
Preparation of azo dyes from other azo compounds > by etherification of hydroxy groups
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