Heterocyclic azo dyes and pigments containing 4-quinazolinone moieties

Azo pigment of the formula ##STR15## wherein D is the radical of an aromatic or hetero-aromatic amine which is free from sulphonic acid groups;

• m is the integer 1 or 2;
• n denotes 0, 1, 2, 3 or 4;
• R.sub.1 is hydrogen or C.sub.1 -C.sub.4 alkyl;
• and
• R.sub.2 is chlorine, bromine, Cl.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, nitro, trifluoromethyl, cyano, carboxamide, C.sub.1 -C.sub.4 -alkyl-carboxamide, phenylcarboxamide, C.sub.1 -C.sub.4 alkylphenylcarboxamide, C.sub.1 -C.sub.4 -alkoxyphenylcarboxamide, fluoro-, chloro-, bromo-phenylcarboxamide, nitrophenylcarboxamide, benzylcarboxamide, C.sub.1 -C.sub.4 -alkylbenzylcarboxamide, C.sub.1 -C.sub.4 -alkoxybenzylcarboxamide, fluoro-, chloro-, bromo-benzylcarboxamide, nitrobenzylcarboxamide, sulphonamide, C.sub.1 -C.sub.4 -alkylsulphonamide, phenylsulphonamide, C.sub.1 -C.sub.4 -alkylphenylsulphonamide, C.sub.1 -C.sub.4 -alkoxyphenylsulphonamide, fluoro-, chloro-, bromo-phenylsulphonamide, nitrophenylsulphonamide, benzylsulphonamide, C.sub.1 -C.sub.4 - alkylbenzylsulphonamide, C.sub.1 -C.sub.4 -alkoxybenzylsulphonamide, fluoro-, chloro-, bromo-benzyl sulphonamide, nitrobenzylsulphonamide, C.sub.1 -C.sub.4 -alkylcarbonylamino, benzoylamino, chlorobenzoylamino, C.sub.1 -C.sub.4 -alkylbenzoylamino, C.sub.1 -C.sub.4 -alkoxybenzoylamino, nitrobenzoylamino, phenylamino, C.sub.1 -C.sub.4 -alkylphenylamino, C.sub.1 -C.sub.4 -alkoxyphenylamino, fluoro-, chloro-, bromo-phenylamino, or nitrophenylamino.