Abstract: The present invention is directed to 2-[[1-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]carbonyl]-2-oxo-propyl]azo]-benzoic acid (C.I. Pigment Yellow 151): (I), characterized by a ?E* (black/white) in masstone below 22.0±0.7, a process for its preparation and its use for pigmenting macromolecular organic materials of natural or synthetic origin. The pigment has high opacity and high color strength.

Abstract: Bisazoquinolone pigments which, in one of the tautomeric forms thereof, correspond to formula (1) wherein W is the radical of an unsubstituted or substituted C6-C24aryl or the radical of an unsubstituted or substituted heteroaryl, Ar1 is unsubstituted or substituted C6-C24aryl or unsubstituted or substituted heteroaryl, Ar11 is unsubstituted or substituted C6-C24aryl or unsubstituted or substituted heteroaryl, R1 R1, R2, R10, R11, and R12 are each independently of the others hydrogen, C1-C6alkyl, halogen, cyano, CF3, nitro, NR3R4, COOR4, NR4COR3, COOX+, COR4, OR4, SR3, S02R3, S02NR3R4, S03-X+, or C6-C24aryl unsubstituted or mono- or poly-substituted by R5, R3 is C1-C6alkyl, or C6-C12aryl unsubstituted or mono- or polysubstituted by halogen, hydroxy, OR7, cyano, nitro, SR7, NR6R7, COOR7, CONR6R7, NR6COR7, NR6COOR7, COO—X+, COR4, OR4, S02R7, S02NR6R7, S03-X+ or by S03R7, R4 is hydrogen or has the same meanings as R3, R5 is hydrogen, C1-C4alkyl, halogen, nitro, NR7R8 or OR7, R6 is hydrogen or C1-C3alkyl, R7 and

Abstract: The present invention relates to azo dyes of formula (1) which are soluble in organic solvents, wherein R1 is —CN, —COOR5, —CONR6R7 or a heterocyclic ring, R2 is unsubstituted or substituted alkyl, unsubstituted or substituted aryl, —CF3, —COOR5, —CONR6R7 or —COR5, R3 is hydrogen, —SO3M, alkyl, alkoxy, alkylcarbonyl, —NO2 or halogen, R4 is substituted aryl, substituted heteroaryl or an aryl-N?N-aryl radical, wherein one or both of the aryl radicals in aryl-N?N-aryl is/are unsubstituted or substituted, or a radical heteroaryl-N?N-heteroaryl, wherein one or both of the heteroaryl radicals in heteroaryl-N?N-heteroaryl is/are unsubstituted or substituted, R5 is hydrogen, alkyl or unsubstituted or substituted aryl, R6 is hydrogen, alkyl or unsubstituted or substituted aryl, R7 is hydrogen, alkyl or unsubstituted or substituted aryl, M+ is a cation, n is a number 1, 2 or 3 and m is a number 1, 2 or 3, to a process for the preparation thereof and to the use thereof in the production of coloured plastics or polym

Abstract: A process for mass coloring high molecular weight organic material by using a pyrimidopteridine of formula I and/or II ##STR1## or a mixture thereof, wherein A, B, C and D are each independently of one another --NH.sub.2, --OH, hydrogen, C.sub.1 -C.sub.4 -alkyl; phenyl, biphenyl or naphthyl which are unsubstituted or substituted by halogen, --OH, --NH.sub.2, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy; --NHR.sub.1, --N(R.sub.1).sub.2 or ##STR2## wherein R.sub.1 is C.sub.1 -C.sub.4 alkyl; phenyl which is unsubstituted or substituted by halogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 -alkoxy, or --COXR.sub.2,X is a direct bond, --O-- or --NH--, andR.sub.2 is C.sub.1 -C.sub.4 alkyl; phenyl which is unsubstituted or substituted by halogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 -alkoxy, with the proviso that at least two of the radicals A, B, C and D are --NH.sub.2 or --OH.

Abstract: The 2,4,5,7-tetraaminopyrimido[5,4-g]pteridine ##STR1## characterized by a hue-angle h of not less than 98, processes for preparing the pteridine I of the invention, novel, insoluble 2,4,5,7-tetraaminopyrimido[5,4-g]pteridine salts, their preparation and the use of the pteridines of the invention.