| http://www.w3.org/ns/prov#value | - The 9-cyano-substituted perylene-3,4-dicarboxylic monoimides of the formulae Ia and Ic according to the invention are advantageously suitable as fluorescent dyes, for coloring high molecular weight organic and inorganic materials, in particular plastics, paints, printing inks, inorganic-organic composites and oxidic layer systems, as dispersants, pigment additives for organic pigments and intermed
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