C09B31/075 - 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 ortho-Hydroxy carboxylic acid amides

• C09B31/078 » containing acid groups, e.g. -COOH, -SOH, -POH, -OSOH, -OPOH; Salts thereof 0