Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors

FMC Corporation:

We consent to incorporation by reference in the Registration Statements on Form S-8 (Nos. 33-10661, 33-7749, 33-41745, 33-48984, 333-18383, 333-24039, 333-62683, 333-69805, 333-69714 and 333-11456) and the Registration Statement on Form S-3 (No. 333-59543) of FMC Corporation of our reports dated February 26, 2007 relating to the consolidated balance sheets of FMC Corporation and consolidated subsidiaries as of December 31, 2006 and 2005, and the related consolidated statements of income, cash flows, and changes in stockholders’ equity for each of the years in the three-year period ended December 31, 2006, and the related financial statement schedule, management’s assessment of the effectiveness of internal control over financial reporting as of December 31, 2006, and the effectiveness of internal control over financial reporting as of December 31, 2006, which reports appear in the December 31, 2006 annual report on Form 10-K of FMC Corporation.

Our report on the consolidated financial statements refers to the Company’s adoption of Statement of Financial Accounting Standards (SFAS) No. 123 (R), Share-Based Payment, and the related interpretations as of January 1, 2006, the adoption of SFAS No. 158, Employers’ Accounting for Defined Benefit Pension and Other Postretirement Plans, on December 31, 2006, and the adoption of Financial Accounting Standards Board Interpretation No. 47, Accounting for Conditional Asset Retirement Obligations, on December 31, 2005.

/s/ KPMG LLP

Philadelphia, Pennsylvania

February 26, 2007