The present invention relates to a trisazo compound represented by the
following formula (1) or a salt thereof,
The formula (1)
##STR00001##
(wherein, the group A is a substituted phenyl group, the group B and the
group C are substituted para-phenylene groups, R.sup.1 represents a C1 to
C4 alkyl group (which may be substituted by a carboxy group), a phenyl
group (which may be substituted by a sulfo group), or a carboxy
group,R.sup.2 represents a cyano group, a carbamoyl group or a carboxy
group, each of R.sup.3 and R.sup.4 independently represents a hydrogen
atom, a methyl group, a chlorine atom or a sulfo group, respectively) and
a water-based black ink composition containing said compound; said
compound has high solubility in a medium where the main component is
water, its aqueous solution having a high concentration and ink are
stable when stored for a long period of time, black-recorded images with
it can be provided where both light fastness and ozone gas fastness of
the printed images are excellent.