C09B31/00 - CPC Classification

Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling

• C09B31/02 » Disazo dyes 5
• C09B31/16 » Trisazo dyes 3
• C09B31/30 » Other polyazo dyes 27