Mixtures of metallocenyl phthalocyanines obtainable by reacting a mixture A comprising two phthalocyanines: ##STR00001## with a metallocene derivative in the presence of a catalyst, and also oligomeric metallocenyl phthalocyanines, processes for preparing them, their use for, inter alia, optical recording and optical recording media.

 
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< Downflow test unit for the study of catalysts in short contact time reactions between the catalyst and the reagents

> Anti-first-pass effect compounds

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