The current invention relates to a perylene-3,4-dicarboxylic anhydride, substituted in the 9-position, of the general formula III ##STR00001## wherein Z is bromine or cyano, and processes for preparing 9-bromoperylene-3,4-dicarboxylic anhydride and 9-cyanoperylene-3,4-dicarboxylic anhydride.

 
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< 3,5-Difluoropyridines

> Continuous process for the preparation of alkyleneimines

> Color-stable superabsorbent polymer composition

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