Hercules Announces Dates for Third Quarter 2007 Earnings Release and Teleconference Schedule

Hercules Incorporated (NYSE:HPC) today announced the following schedule and teleconference information for its third quarter earnings release and teleconference: Earnings Release: October 24, 2007 - After the stock market closes. Distribution: Business Wire and Hercules' website at www.herc.com. Teleconference: October 25, 2007 -- 9:00 a.m. (Eastern). Dial in Number: 973-935-8511 - Ask for Conference ID # 9266612 Please call 5-10 minutes before the scheduled start of the teleconference. Webcast: Listen-only mode via Internet broadcast from Hercules' website at www.herc.com, under Shareholder Information. Web Replay: Will be available beginning at noon on October 25, 2007 on the web at www.herc.com, under Shareholder Information. 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.