Degussa AG, Röhm GmbH & Co. KG (the former Agomer GmbH and Röhm GmbH) and Para-Chemie GmbH, from 23 January 1997 until 12 September 2002;
Degussa AG, Röhm GmbH & Co. KG (endine Agomer GmbH ja Röhm GmbH) ja Para-Chemie GmbH – 23. jaanuar 1997 kuni 12. september 2002;