News and Press Releases

Wilmington, DE., and Newtown, PA., US, May 27, 2008 – DuPont and Rotam today announced that
they have entered into a patent non-assertion agreement indicating DuPont will not pursue patent
infringement litigation against Rotam with respect to any manufacture, marketing and sale of a
monohydrate form of nicosulfuron in the United States.

This agreement, which included a negotiated fee from Rotam in return for the non-assertion grant,
represents part of an ongoing DuPont program to protect its intellectual property rights.

“Agreements like this one allow DuPont to obtain fair value for its intellectual property rights,” said
John Chrosniak, DuPont regional director for North America.

"This agreement allows Rotam to provide its U.S. customers with agricultural products containing
granular nicosulfuron, manufactured by Rotam, without an assertion action from DuPont" said
Alvaro Canizares, president of Rotam North America, Inc.

Details of the agreement, including the amount of consideration paid by Rotam to DuPont for the
non-assertion, were not disclosed.

This agreement is not connected to, and does not impact any other matter or issue that exists or
may arise between the parties with respect to nicosulfuron.

The Rotam Group is comprised of more than 40 companies operating in 52 countries, with group
headquarters in Vancouver, Canada, and Hong Kong.  The Rotam Group is basic in the life
sciences, including veterinary and agricultural chemicals (fungicides, insecticides and herbicides),
pharmaceuticals, as well as barrier packaging for finished products.  Rotam North America, Inc. is
the crop protection unit of Rotam Group operating in the United States and Canada.

DuPont is a science-based products and services company. Founded in 1802, DuPont puts
science to work by creating sustainable solutions essential to a better, safer, healthier life for people
everywhere.  Operating in more than 70 countries, DuPont offers a wide range of innovative
products and services for markets including agriculture and food; building and construction;
communications; and transportation.

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