C09B31/06 - CPC Classification

Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling; Disazo dyes from a coupling component "C" containing a directive hydroxyl group

• C09B31/061 » {containing acid groups, e.g. -COH, -SOH, -POH, -OSOH, -OPOH; Salts thereof} 1
• C09B31/062 » Phenols 8
• C09B31/068 » Naphthols 7
• C09B31/075 » ortho-Hydroxy carboxylic acid amides 0