Phthalocyanine dyes, inks containing the same and use thereof in ink jet printing

One or more compounds of Formula (1) and salts thereof:

• ##STR9## in which:
• M represents a metal or H;
• Pc represents a phthalocyanine nucleus;
• and
• R.sup.1 represents H or --(CH.sub.2).sub.n R.sup.3 ;
• R.sup.2 represents --(CH.sub.2).sub.n R.sup.3 ;
• or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached represent a 5 or 6-membered ring;
• where:
• n is independently an integer from 1 to 30;
• and
• R.sup.3 is independently selected from the grout consisting of H, hydroxy, sulpho, cyano, --SR.sup.4, --CO.sub.2 R.sup.5, --PO.sub.3 H.sub.2 and --NR.sup.6 R.sup.7 ;
• where:
• R.sup.4, R.sup.5, R.sup.6 and R.sup.7 independently represent H, C,.sub.1-30 alkyl optionally substituted by one or more groups selected from the group consisting of hydroxy, mercapto, sulpho, carboxy, cyano and --PO.sub.3 H.sub.2 ;
• v is the valence of Pc divided by the valence of M;
• x is from 1.2 to 3.8;
• y is from 0.1 to 2.7;
• z is from 0.1 to 2.7;
• and
• x, y and z satisfy 2.ltoreq.x+y+z.ltoreq.4;
• with the provisos that:
• R.sup.4 and R.sup.5 are other than both H;
• when R.sup.1 is H or C.sub.1-4 alkyl then R.sup.4 is other than C.sub.1-4 alkyleneSO.sub.3 H;
• when R.sup.1 is H or C.sub.1-4 alkyl and R.sup.6 is H, C.sub.1-4 alkyl or hydroxyC.sub.1-4 alkyl;
• then R.sup.7 is other than C.sub.1-4 alkyl or hydroxyC.sub.1-4 alkyl;
• and
• when R.sup.1 is H or C.sub.1-4 alkyl then R.sup.6 and R.sup.7 are other than both H.