WILMINGTON, DE, APRIL 17, 2008 . . . The Board of Directors of Hercules Incorporated (NYSE: HPC) today declared a quarterly cash dividend payment of five cents per common share to shareholders of record on June 27, 2008 payable on July 25, 2008.

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Hercules manufactures and markets chemical specialties globally for making a variety of products for home, office and industrial markets. For more information, visit the Hercules website at www.herc.com.