Sigma-Aldrich Fourth Quarter Results Conference Call

Sigma-Aldrich Corporation will hold its quarterly conference call to discuss fourth quarter results at 10:00 AM Central Time (11:00 AM Eastern Time). Interested parties may listen via live audio broadcast and view the slide presentation over the Internet available. Users can click the "Webcast" icon to access this file. Replay will be available February 9, 2011 through February 16, 2011