Bayer Aktiengesellschaft

Guenter Gehrke

Rutger Neeff

Volker Hederich

Friedrich Wilhelm Kroeck

Anthraquinone dyestuffs of the formula ##SPC1## In which X.sub.1 denotes hydroxyl or amino, X.sub.2 denotes hydroxyl, amino, alkylamino, cycloalkylamino, arylamino, acylamino, alkylmercapto or arylmercapto, R denotes hydrogen, alkyl, aralkyl, cycloalkyl or aryl, Z denotes alkylene, Ac denotes acyl and Y denotes hydrogen or halogen, and in which the ring A can optionally by substituted by halogen, as well as their preparation and use for the dyeing of synthetic fibre materials. The dyed materials show good fastness to light and sublimation

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Cologne, Germany

Guenter Gehrke