ClassID:

102135

C09B31/147 - 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 other coupling components "C"; Heterocyclic components 1,2-Diazoles Pyrazoles

Recent Application in this class: