Rockwood To Form Global Specialty Chemicals Group

Affiliates of Rockwood Specialties
Group Inc., Princeton, N.J., a global specialty chemicals and advanced materials company, will
acquire four businesses from Germany-based Dynamit Nobel, the chemical branch of Frankfurt-based mg
technologies AG, to form a new global specialty chemicals group with combined revenues of $2.5
billion. The four businesses include Sachtleben Chemie GmbH, Chemetall GmbH, CeramTec AG and DNES
Custom Synthesis.

Sachtleben Chemie produces titanium dioxide for man-made fiber applications, and barium- and
zinc-based white pigments. Currently it is developing ultraviolet-protection, cosmetics and
catalyst nanoparticle applications for titanium dioxide.

June 2004