ClassID:

102118

C09B31/057 - CPC Classification

Classification description:

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 amino group; Amino naphthalenes containing acid groups, e.g. —COH, —SOH, —POH, —OSOH, —OPOH; Salts thereof

Recent Application in this class: