Bis-(1-substituted phenylazo-2-hydroxynaphthalene-3-carboxamido)naphthalenes

Abstract

Compounds of the formula ##STR1## in which A signifies a 1,4- or 1,5-naphthylene radical, unsubstituted or substituted by up to two substituents selected from chlorine, bromine, methyl, nitro, methoxy and cyano, The R.sub.1 's, independently, signify halogen or nitro, and The R.sub.2 's, R.sub.3 's, R.sub.4 's and R.sub.5 's, independently, signify hydrogen, halogen or lower alkoxycarbonyl, with the proviso that I. each benzene nucleus bears at least two substituents, and Ii. each benzene nucleus bears no more than one alkoxycarbonyl group, Which, alone or in admixture one with another, are useful inter alia for pigmenting plastics in the mass and as pigmenting agents in surface coatings.

Dependencies are inferred from the claim text.