Abstract: The issue of the present invention is to provide a disazo pigment in which the polychlorinated biphenyl (PCB) content in addition to the primary aromatic amine (PAA) content is reduced. The present invention provides a pigment composition containing a disazo pigment, an alkylamine that has an alkyl group having a carbon number of 8 or more, and a poly(oxyethylene) alkyl ester that has an alkyl group having a carbon number of 8 or more. Preferably, the disazo pigment includes at least one disazo pigment selected from a group consisting of C.I. Pigment Yellow 83, C.I. Pigment Yellow 13, and C.I. Pigment Yellow 14.

Abstract: The issue of the present invention is to provide a disazo pigment with high safety in which the content of chemical substances that may be harmful, in particular, in the food packaging field and the like and that may be regulated substances is reduced. A disazo pigment according to the present invention has a polychlorinated biphenyl content of less than 15 ppm and a primary aromatic amine content of less than 700 ppm. Preferably, the disazo pigment is at least one selected from a group consisting of C.I. Pigment Yellow 83, C.I. Pigment Yellow 13, and Cl. Pigment Yellow 14.

Abstract: The aqueous pigment dispersion for IJ inks has excellent dispersion quality as well as high color strength and light fastness and is particularly suited for use as an U aqueous pigment ink. It includes C.I. Pigment Yellow 180, a block copolymer having an acid value of 10 or more and 20 or less and an amine value of 20 or less, and water. The present invention also provides C.I. Pigment Yellow 180 having an aspect ratio of 1.0 to 2.0, a primary particle shorter diameter of 30 to 100 nm, and a crystallite size of 15.0 nm or more as calculated from the Scherrer equation based on the full width at half maximum of a peak A indicated by a maximum diffraction intensity at a diffraction angle 2?=6.7±0.50 in a powder X-ray diffraction pattern of diffraction intensities versus 2? measured using CuK? radiation.