Bisazo inkjet dyes

摘要

A bisazo dye of Formula (1) and salts thereof: <IMAGE> Formula (1) wherein: R1 and R2 together with the carbon atoms to which they are attached form a 5- or 6- membered carbocyclic ring which is optionally substituted by SO3H; R3 and R4 are each independently H or C1-4-alkyl; y is 1, 2, 3 or 4; and n is 1, 2 or 3. The dyes are useful for ink jet printing.