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, andThe 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 thatI. each benzene nucleus bears at least two substituents, andIi. 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.

Abstract: Compounds of the formula ##STR1## wherein each R.sub.1 is alkyl of 1 to 3 carbon atoms, andA is phenylene, substituted phenylene, diphenylene, substituted diphenylene or naphthylene, wherein each substituent of substituted phenylene is independently fluoro, chloro, bromo, methyl, methoxy, ethoxy, trifluoromethyl or cyano and each substituent of substituted diphenylene is independently chloro, bromo, methyl or methoxy,With the proviso the two CO--O--R.sub.1 groups on each ring are meta or para to each other. These compounds are eminently suitable as pigments for the mass pigmentation of synthetic polymers and resins such as polyethylene, polystyrene, polyvinyl chloride, poromerics and rubber latices.