Phthalocyanine compounds for ink-jet printing

Phthalocyanine compounds of Formula (1) have utility as colorants in inks for ink-jet printing, where Formula (1) represents:which comprises any form of the compound: such as salt; stereoisomer, zwitterion, polymorph, complex, isotopic form, combinations thereof in the same species and mixtures thereof; where:M represents H, metal, halometal, oxymetal and/or hydroxymetal;k is the inverse of half of the valency of M;Pc represents a phthalocyanine nucleus of Formula (2):L represents a linking group comprising an optionally substituted C1-30carbyl;A represents -O-, -S- or -NR3-, where R3 independently comprises H or optionally substituted C1-30carbyl;R1 comprises at least one group independently selected from: an optional substituent and optionally substituted C1-15carbyl;R2 comprises optionally substituted C1-30carbyl that comprises at least one alkyl group substituted by at least one of: hydroxy, carboxy and sulpho;z represents an integer from 0 to 4; w represents an integer from 1 to 5; and the sum of w +z is from 1 to 5; andx and y each independently represent a non-zero number; and the mean of the sum of x +y is from about 1 to about 6;where the optional substituents comprise at least one of: carboxy, sulpho, hydroxy, amino, mercapto, cyano, nitro and halo.