- 1/3 - 

# News Release

Emissions testing discussion at CPI Conference:



### Bayer MaterialScience, as part of emissions testing project team, explores effect of building materials on indoor air quality

Technical paper presentation discusses protocol developed to test effect of spray polyurethane foam

San Antonio, September 29, 2008 — As t he general public becomes increasingly aware of the significance of indoor ai r quality (IAQ), governmental agencies and public health organizations are also directi ng more attention toward this important issue. The increased attention on IAQ prom pted the Center for the Polyurethanes Industry (CPI) and the Spray Polyurethane F oam Alliance (SPFA) to jointly fund a project to learn more about the effect on IAQ fr om chemicals that may potentially be released from building ma terials – more specifically spray polyurethane foam – into t he indoor air of a building.

The specifics of the projec t and testing protocol will be explored in detail at the American Chemistry Council’s Center fo r the Polyurethanes Industry (CPI) Conference, taking place Sept. 29 – Oc t. 1, 2008, in Sa n Antonio. Brian Karlovich, CIH, CSP, manager of I ndustrial Hygiene Customer Services, Product Safety & Regulatory Affairs, Baye r MaterialScience LLC, will present the

paper, CPI/SPFA Spray Polyurethane Foam Insulation Emissions Testing Project, during the Tuesday morning technica l session on Environment, Health and Safety. Bayer MaterialScience LLC 100 Bayer Road Pittsburgh, PA 15205-9741 412-777-2000- 2/3 - The Spray Polyurethane Foam Insulation Emissions Testing Project, led by a team of representatives from ac ross the industry, including Bayer MaterialScience, developed a comprehensive testing protocol to evaluate the potential impact of installed spray polyure thane foam on IAQ. The draft protocol addresses foam sample preparation, co llection and packaging, testing chamber parameters, and air sampling and analytic al methods, among ot her factors. Once the protocol is fina lized, it will be available fo r use by spray polyurethane

foam manufacturers to te st their particular spray foam products.

In the paper and presentation, Karlovich out lines the process that was taken to develop the protocol. Firs t, the team reviewed ex isting emissions testing programs and selected t he Underwriters’ Laborator ies of Canada – “Standard Laboratory Guide for the Determination of VOC Emissions from Polyurethane Foam” (CAN/ULC S774) as a basis for its protocol; the pr otocol that was developed is a modified version of CAN/UL C S774. The team then obtained blind data on blowing agents, catalysts and flam e retardants from spray polyurethane

foam manufacturers and i dentified the most repeated chemicals to determine “industry representative” spray polyurethane foams.

The project team selected a laborator y, Air Quality Sciences (AQS), and polyurethane foam manufacturers to prepare the “industry representative” samples of one open-cell and one closed-cell foam. With specific instructions and parameters for the foam sa mples, the manufacturers supplied the foams to AQS where the emissions tests were perform ed within stainless steel chambers under tightly controlled environmental conditions.

The discussion explores the exact testi ng procedure, in which air samples were collected at specific intervals following t he foam’s placement in the chamber and tested for particular chemicals. For the nex t step, AQS will complete reports that include data, results and a detailed risk analysis based on its findings. These results will only be applicable to the par ticular spray polyurethane foam products that were tested, not to all spray pol yurethane foam insulation products. In addition to posting the results on the CP I and SPFA Web sites, the project may be placed in a peer-reviewed journal, and t he team will explore the feasibility of making the protocol an ASTM or other standard.- 3/3 - Bayer MaterialScience LLC is one of t he leading producers of polymers and highperformance plastics in North Americ a and is part of the global Bayer MaterialScience business with nearly 15,400 employees at 30 sites around the

world and 2007 sales of 10.4 b illion euros. Business activities are focused on the manufacture of high-tech polymer mate rials and the development of innovative solutions for products used in many ar eas of daily life. The main segments served are the automotive, el ectrical and electronics, co nstruction, medical, and sports and leisure industries. Our i norganic basic chemicals unit produces chlorine and related essential produc ts for the chemicals industry.

Bayer Corporation, headquartered in Pittsbur gh, is a subsidiary of Bayer AG, an international health care, nutrition and high-tech materials group based in Leverkusen, Germany. In North America, Bayer had 2007 net sales of 8.1 billion euros and employed 16,800 at year end. Bayer’s three subgroups, Bayer HealthCare, Bayer CropScience and Baye r MaterialScience, improve people’s lives through a broad range of essential pr oducts that help diagnose, prevent and treat diseases; protect crops and enhanc e yields; and advance automobile safety and durability.

Contact : Thomas Erdner, Phone: 412-777-5200

E-mail: thomas.erdner@bayerbms.com

For more information about BMS or for a copy of this technical paper, call 1-800-662-2927, e-mail naftainfo@bayerbms.com or visit www.bayermaterialscienceNAFTA.com

.

This news release contains forward-looking stat ements 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 ac tual future results, financial situation, development or performance of the company and the estimates given here. These fact ors include those discussed in our annual and interim reports filed with the Frankfurt Stock Exchange. The company assumes no liability whatsoever to update these forward-looking statements or to conf orm them to future events or developments.