Magenta metal chelate dyes and their use ink-jet printers

摘要

A metal chelate compound of Formula (1) or a salt thereof: <?in-line-formulae description="In-line Formulae" end="lead"?>[A-N-N-B]M Formula (1)<?in-line-formulae description="In-line Formulae" end="tail"?> wherein: A is an optionally substituted pyridyl ring; and B is of the Formula (2): wherein: X and W are substituents other than H; M is a metal chelated to A-N-N-B; and n is 0 to 4, also claimed are compositions and inks containing a compound of Formula (1), a process for ink jet printing using the inks and an ink jet printer cartridge containing the ink.