Abstract: The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates necessary for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper. The dyes are of formula (14), (15) or (16) in which R1 represents hydrogen, C1-C4alkyl, C1-C4alkoxy or SO3H, R2 represents SO3H or CO2H, R3 represents hydrogen, C1-C4alkyl, halogen, hydroxy, C1-C4alkoxy, carboxy, NH2 or NHC1-C4alkyl, R3a represents hydrogen or NH2 and A1 and A2, independently of the other, is selected from the group consisting of an acetoacetylated amine, a derivative of barbituric acid, a 2,4,6-triaminopyrimidine derivative, a pyridone derivative, an aminopyrazole or a pyrazolone derivative and a benzoic acid derivative, or A1 and A2, each one independently of the other, represent a certain phenol residue.

Abstract: The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates necessary for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper.

Abstract: An azo compound of the following formulae (I) or (II): ##STR1## wherein Q.sub.1 represents a phenyl group or a naphthyl group, Q.sub.2 represents a phenyl group; R represents hydroxy group; R.sub.1 and R.sub.2 each independently represent a hydrogen atom, a hydroxy group, a C.sub.1 -C.sub.4 alkyl group, a C.sub.1 -C.sub.4 alkoxy group or a halogen atom; R.sub.3 and R.sub.4 each independently represent a hydrogen atom, a hydroxy group, a C.sub.1 -C.sub.4 alkyl group, a C.sub.1 -C.sub.4 alkoxy group or a substituted amino group; and X represents --NH--, --NHCO-- or --N.dbd.N--; or a salt thereof;and a polarizing film containing the same.

Abstract: A group of compounds comprising the reaction product of a hydroxy naphthylamine sulfonic acid with a diazotized compound comprising, an aromatic azo substituted Cleves Acid such that the diazotized compound is coupled with the hydroxy naphthylamine sulfonic acid ortho to the amine group. More particularly the compounds of the invention comprise a compound having the formula: ##STR1## wherein R.sub.1 is an aromatic azo radical, R.sub.2 is hydrogen or an aromatic azo group and R.sub.3 is amino, substituted amino or an aromatic azo group. The invention further includes inks made from such compositions and methods for using such inks in ink jet printers.

Abstract: According to the present invention there is provided a compound which, in the free acid form, is of the Formula (1): ##STR1## wherein A is an optionally substituted phenyl or naphthyl group;Z is H, CO.sub.2 H, SO.sub.3 H or SO.sub.2 NH.sub.2 ;T is H or SO.sub.3 H;R.sup.1 is H or optionally substituted alkyl;V is H, CO.sub.2 H, SO.sub.3 H, CH.sub.3 or Cl; provided that the compound of Formula (1) has at least as many CO.sub.2 H groups as SO.sub.3 H groups.The compound is useful as a colorant for inks used in ink jet printing.

Abstract: The presence and location of amyloid deposits in an organ or body area of a patient is effected by intravenous administration of novel radioactive iodine-labeled amyloid binding compounds and preferably .sup.123 I-labeled compounds to the patient and sensing radiation emitted from the organ or body area. Novel non-radioactive iodine substituted amyloid binding compounds and amyloid binding compounds which are readily iodinated are further aspects of the invention.