| 摘要 |
PROBLEM TO BE SOLVED: To provide a water soluble yellow pigment (compound) having high water solubility and excellent in various fastnesses such as water resistance, moisture resistance, ozone gas resistance, scratch resistance and light resistance, especially light resistance, and a yellow ink composition for various recordings, especially inkjet recording, containing the same.SOLUTION: There is provided a water soluble azo compound represented by the formula (1) or a salt thereof. In the formula (1), Q represents a halogen atom, x represents an integer of 2 to 4 and Z represents a hydrogen atom or a sulfo group. |
