Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 33-37279) of Hercules Incorporated of our report dated June 6, 2005 relating to the financial statements of the Hercules Incorporated Savings and Investment Plan, which appears in this Form 11-K.
/s/ MorisonCogen LLP
Bala Cynwyd, Pennsylvania
May 12, 2006