| abstract |
A compound which, in the free acid form, is of Formula (1a): <IMAGE> wherein W and X are each independently selected from H, COOH, @@ SO3H, halo, hydroxy, nitro, cyano, @@@@ C1-6-alkyl, C1-6-alkoxy and @@@@ C1-7-acylamino; Y is H, COOH or SO3H; V is H or SO3H; R and R<1> are each independently H or C1-6-alkyl substituted by 0, 1 or 2 -COOR<2> groups; and R<2> is H or C1-6-alkyl; provided that at least one of W, X and Y is COOH. The compound is useful as a black dye in ink jet printing. |