| abstract |
An object of the present invention is to provide naphthol red which is excellent in dispersibility and excellent in color developability by controlling the shape of particles. Further, a resin composition colored by the naphthol red, an aqueous dispersion, a solvent dispersion, and a production method are provided. The above object is a naphthol red having an axial ratio of the primary particles (average major axis diameter/average minor axis diameter) of 1.0 to 2.0; or naphthol red represented by the chemical formula (11), and the chemical formula (4) is represented by a hydrophilic naphthol derivative, or a hydrophilic phenol derivative represented by the chemical formula (5), which is subjected to 0.01 to 0.3% by weight of a surface treated naphthol red; a resin composition containing the naphthol red; an aqueous dispersion; a solvent dispersion Body; or manufacturing method to achieve. |