Bayer MaterialScience raises prices for Apec ®, Makrolon®, Bayblend® and Makroblend® polycarbonates

Friday - September 1, 2006 - Leverkusen – Bayer MaterialScience AG is increasing sales prices for its Apec®, Makrolon®, Bayblend®, and Makroblend® brands of polycarbonates by EUR 0.20 per kilogram as of September 1, 2006. This applies to all deliveries in the EMEA / LA region (Europe, Middle East, Africa / Latin America). The decision by the Polycarbonates Business Unit to raise prices is largely motivated by continued increases in energy costs for manufacturing polycarbonate products. Added to this is high expenditure for logistics and transportation. The continuing increases in costs are so severe for Bayer MaterialScience that they cannot be compensated by internal measures to boost efficiency. Increasing prices also safeguards the ongoing investment necessary to provide optimum support in meeting the growing demand for engineering thermoplastics such as Apec®, Makrolon®, Bayblend®, and Makroblend®. Customers have been informed individually about the changes to their cost prices. Contractual obligations in existence at the time when the price increases come into effect remain unaffected.

With sales of EUR 10.7 billion in 2005, Bayer MaterialScience AG is one of the world’s largest polymer manufacturers. Its main fields of activity are the production of high-tech polymer materials and the development of innovative solutions for products used in many areas of everyday life. The main consumer sectors are the automotive, electrical/electronics, construction, sports and leisure industries. Bayer MaterialScience has production facilities at 40 sites around the world and a workforce of approx. 18,800. Bayer MaterialScience is part of the Bayer Group.

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This news release contains forward-looking statements based on current assumptions and forecasts made by Bayer Group management. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of the company and the estimates given here. These factors include those discussed in our public reports filed with the Frankfurt Stock Exchange and with the U.S. Securities and Exchange Commission (including our Form 20-F). The company assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.

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Andrea Huber

Trade and Technical Press

Bayer MaterialScience AG

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