TimTec Corporation

TimTec Inc. is expressing customer and business partner appreciation as the company marks 10-years anniversary on the market of early drug-discovery. - October 17, 2005

Sigma-Aldrich (NASDAQ:SIAL) is pleased to announce the availability of the MyriaScreen Diversity Collection of drug-like screening compounds. The collection, produced in collaboration with TimTec Inc. (http://www.timtec.net), is the result of careful evaluation, filtering, and refinement of selections from each of our screening compound collections. - September 23, 2005