Hercules Research Center to Celebrate 75th Anniversary


Ceremonies to include Dedication of Paper Applications Laboratory

WILMINGTON, Del.-- Sept. 22, 2006--Hercules Incorporated (NYSE:HPC) will celebrate the 75th anniversary of the Hercules Research Center on Wednesday, October 4, 2006. A full day of activities is planned including the formal dedication and ribbon cutting ceremony for the Paper Applications Laboratory, the newest addition to the Research Center site. Following the dedication, guests will be invited to participate in open house tours of the facility. The event will conclude with technology presentations conducted by research leaders.

"As we look forward to celebrating this significant milestone in Hercules long history in Delaware, we are especially pleased that it coincides with the dedication of our Paper Applications Laboratory," noted Hercules President and CEO Craig Rogerson. "This state-of-the-art customer applications facility underscores Hercules ongoing commitment to research and development."

The Paper Applications Laboratory is the initial phase of a significant investment by Hercules to revitalize the Research Center. The investments also include renovations to existing laboratory operations.

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

Contacts

Media Contact:

John S. Riley,
Hercules Incorporated,
302-594-6025

Investor Contact:

Stuart L. Fornoff,
Hercules Incorporated,
302-594-7151

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