| abstract |
There is provided an azo pigment having excellent coloring characteristics such as coloring power and stable particle size thereof even with the lapse of time, and showing excellent stability as a pigment dispersion and excellent stability as an ink liquid. There is also provided a pigment dispersion showing excellent coloring characteristics, storage stability of dispersions, and ink liquid stability by dispersing the pigment of the invention in various media. An azo pigment represented by the following formula (1) and having characteristic peaks at Bragg angles (2 θ ± 0.2 DEG ) of 7.5 DEG, 25.8 DEG, and 26.9 in X-ray diffraction with characteristic Cu K α line, and a tautomer thereof. |