Sigma-Aldrich Appoints Kirk Richter as Interim CFO

Sigma-Aldrich SIAL announces the appointment of Kirk Richter to the role of Interim Chief Financial Officer. He currently serves as Vice President and Treasurer, duties that he will continue to perform. He succeeds Rakesh Sachdev in the CFO role with Mr. Sachdev's appointment to President and CEO. Mr. Richter will serve in this role until such time as the Board of Directors has determined a permanent replacement for Mr. Sachdev.