| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly pure trisazo compound which is useful as a pigment for ink jet recording black water-based inks or the like and has excellent light resistance. SOLUTION: The trisazo compound represented by the formula [A<SP>1</SP>is a group represented by the formula: COOM or SO<SB>3</SB>M; A<SP>2</SP>is H or a group represented by the formula: COOM or SO<SB>3</SB>M; M groups are each independently H or an onium salt; R groups are each independently H, an alkyl, an alkoxy, or the like; B is the residue of K acid; Nps is the residue ofγacid, j acid or RR acid]. COPYRIGHT: (C)2003,JPO |
