WILMINGTON, DE, SEPTEMBER 20, 2007 . . . Hercules Incorporated (NYSE: HPC) announced today that Craig A. Rogerson, President and Chief Executive Officer, will address the Credit Suisse Annual Chemical Conference in New York on September 25, 2007 at 8:40 a.m. (Eastern).

Webcast:
An audio webcast will be available on Hercules' website, www.herc.com in the Shareholder Information section under Presentations.  Also, in this section of our website, copies of the presentation slides will be available on the date of the presentation to all investors, news media and the general public.

Replay:
An "on demand" replay will be available approximately 24-hours after the live presentation on Hercules’ website, www.herc.com in the Shareholder Information section under Presentations.

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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.