Bisazo compounds of the Formula (1) and salts thereof are disclosed Ar 1 -N=N-J-X-NR 1 L (1) Ar 2 -N=N-J-X-NR 2 wherein Ar 1 and Ar 2 , which may be the same or different, represent groups of the formula: R 3 represents H, alkyl or -COOH; J represents L represents a divalent organic linking group and each of R 1 and R 2 , independently, represents H or optionally substituted hydrocarbyl or R 1 and/or R 2 together with L and the attached nitrogen atom(s) form a 5- or 6-membered ring; X represents L 1 represents -OR 4 , -SR 4 or -NR 5 R 6 in which each of R 4 , R 5 and R 6 , independently, represents H or optionally substituted hydrocarbyl or R 5 and R 6 together with the attached nitrogen atom form a 5- or 6-membered ring; provided that at least one of L and L 1 comprises a residue of the formula -A-NR 7 R 8 (wherein A represents an optionally substituted alkylene group containing 2 or more carbon atoms and each of R 7 and R 8 , independently, represents H or optionally substituted hydrocarbyl or R 7 and R 8 together with the attached nitrogen atom form a 5-or 6-membered ring); the compounds of Formula (1), being free from fibre-reactive groups and any carboxyl substituents present in the compounds, other than those in Ar 1 and Ar 2 , being attached in the form of one or more residue of the following formulae : Also claimed are ink compositions comprising the above compounds; a process for printing substrates with the ink compositions using an ink-jet printer; paper, overhead projector slides and textile materials printed with the ink compositions; and a process for coloration of textile materials with the ink compositions.
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