UNITED STATES
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                              Hercules Incorporated
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                        HERCULES TO HOLD TELECONFERENCE--
                                  MAY 17, 2001



WILMINGTON, DE, MAY 16, 2001 . . . Hercules Incorporated (NYSE: HPC) today
announced that it has scheduled a teleconference for Thursday, May 17th. The
call will take place at 9:00 AM.

Hercules  Chairman  Thomas  L.  Gossage  will  host  the   teleconference  and
introduce the new Chief  Executive  Officer  William H. Joyce.  The conference
will provide an update on the status of the merger and sale process,  which is
continuing.

To join us, please dial 973-872-3100 approximately 10 minutes before the
starting time and ask the operator for the Hercules Teleconference.

A replay of the meeting will be available from mid morning on May 17th until
midnight May 21st by dialing 973-341-3080, pin number 2606364.


INVESTOR CONTACT:
Allen A. Spizzo
302-594-6491

MEDIA CONTACT:
John S. Riley
302-594-6025