Disazo dyes and ink jet inks containing them

1. A composition comprising a liquid medium and a compound of Formula (1) or a salt thereof:

wherein:

m is 1 or 2;

n is 1 or 2; and

x is 2 to 4.

2. A composition according to claim 1 wherein the liquid medium comprises a mixture of water and one or more organic solvents.

3. A process for printing an image on a substrate comprising applying thereto a composition according to claim 1 or 2 .

4. An ink jet printer cartridge, optionally refillable, comprising one or more chambers and a composition, wherein the composition is present in at least one of the chambers and the composition is as defined in claim 1 or 2 .

5. A paper, an overhead projector slide or a textile material printed with a composition according to claim 1 or 2 .

6. A compound of Formula (1) or a salt thereof:

wherein:

m is 1 or 2;

n is 1 or 2; and

x is 2 to 4;

and provided that the compound is not of the Formula (A) or a salt thereof:

7. A paper, an overhead projector slide or a textile material printed by a process according to claim 3 .