Azo dyes of Formula (1) have utility as dyes for ink-jet printing where Formula (1) represents: ##STR1## which comprises any suitable form of the compound: such as salt; stereoisomer, zwitterion, polymorph, complex, isotopic form, combinations thereof in the same species and mixtures thereof; where: p represents from 1 to 7 inclusive; the napthyl moiety may be optionally substituted; R.sup.1 comprises at least one of the following substituents, optionally substituted: H, C.sub.1-4 -alkyl, NHCOC.sub.1-4 alkyl, C.sub.1-4 alkoxy, NHCOaryl, NHSO.sub.2 C.sub.1-4 alkyl, NHSO.sub.2 aryl, NHCONR.sup.3 R.sup.4 where R.sup.3 and R.sup.4 each independently comprises H, C.sub.1-4 alkyl or aryl; R.sup.2 comprises H, C.sub.1-4 alkyl or C.sub.1-4 alkoxy; L.sup.1 and L.sup.2 each independently comprises at least one of the following substituents, optionally substituted: --NH.sub.2, --NHC.sub.1-4 alkyleneOH, --SC.sub.1-4 alkylene --SO.sub.3 H, --NHC.sub.1-4 alkyleneN(C.sub.1-4 alkyl).sub.2, --N(C.sub.1-4 alkyleneOH).sub.2, --NHC.sub.1-4 alkyleneSO.sub.3 H, --NHC.sub.1-4 alkylene(CO.sub.2 H).sub.n where n is 1, 2 or 3, --SC.sub.1-4 alkylene(CO.sub.2 H).sub.m where m is 1, 2 or 3, a moiety of Formula (2): ##STR2## where: X represents NHC.sub.1-4 alkylene or a direct link and Y represents O or NH; amoiety of Formula (3): ##STR3## where: q represents from 1 to 7 inclusive; the napthyl moiety may be optionally substituted; and R.sup.5 and R.sup.6 each independently comprises at least one of the following substituents, optionally substituted: H, C.sub.1-4 -alkyl, NHCOC.sub.1-4 alkyl, C.sub.1-4 alkoxy, NHCOaryl, NHSO.sub.2 C.sub.1-4 alkyl, NHSO.sub.2 aryl and NHCONR.sup.7 R.sup.8 where R.sup.7 and R.sup.8 each independently comprises H, C.sub.1-4 alkyl, aryl; and any other suitable labile or non-labile substituent not mentioned above; where the optional substituents herein comprise: C.sub.1-4 alkyl (optionally substituted with at least one halo), C.sub.1-4 alkoxy (optionally substituted with at least one halo), carboxy, sulpho, hydroxy, amino, mercapto, cyano, nitro and halo.

 
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