ADVISORY, May 20, 2013 (GLOBE NEWSWIRE) -- What: Sigma-Aldrich Corporation [SIAL], a leading Life Science and High Technology company with customers in research and applied labs as well as in industrial and commercial markets, will visit the NASDAQ MarketSite in Times Square. In honor of the occasion, Rakesh Sachdev, President & CEO will ring the Opening Bell. Where: NASDAQ MarketSite – 4 Times Square – 43 rd & Broadway – Broadcast Studio When: Tuesday, May 21, 2013 – 9:15 a.m. to 9:30 a.m. ET Contact: Jen McMahon (314) 236-0986 firstname.lastname@example.org NASDAQ MarketSite: Jennifer Knapp (212) 401-8916 Jennifer.email@example.com Feed Information: *As of January 7, 2013 the Ceremony feeds will be in HD 1080i. Fiber Line (Encompass Waterfront): 4463 Gal 3C/06C 95.05 degrees West 18 mhz Lower DL 3811 Vertical FEC 3/4 SR 13.235 DR 18.295411 MOD 4:2:0 DVBS QPSK Facebook and Twitter: For multimedia features such as exclusive content, photo postings, status updates and video of bell ceremonies please visit our Facebook page at: http://www.facebook.com/NASDAQ . For news tweets, please visit our Twitter page at: http://twitter.com/nasdaqomx . Webcast: A live webcast of the NASDAQ Opening Bell will be available at: http://www.nasdaq.com/about/marketsitetowervideo.asx . Photos: To obtain a hi-resolution photograph of the Market Open, please go to http://www.nasdaq.com/reference/marketsite_events.stm and click on the market open of your choice. About Sigma-Aldrich Corporation [SIAL]: Sigma-Aldrich is a leading Life Science and High Technology company whose biochemical and organic chemical products, kits and services are used in scientific research, including genomic and proteomic research, biotechnology, pharmaceutical development, the diagnosis of disease and as key components in pharmaceutical, diagnostics and high technology manufacturing. Sigma-Aldrich customers include more than one million scientists and technologists in life science companies, university and government institutions, hospitals and industry. The Company operates in 38 countries and has approximately 9,000 employees whose objective is to provide excellent service worldwide. Sigma-Aldrich is committed to accelerating customer success through innovation and leadership in Life Science, High Technology and Service. For more information about Sigma-Aldrich, please visit the website at www.sigma-aldrich.com . About NASDAQ-100 Index®: The NASDAQ-100 Index, launched in January 1985, is one of the most widely followed benchmarks in the world. The NASDAQ-100 Index is the basis of the PowerShares QQQ Trust (Nasdaq:QQQ) which aims to provide investment results that, before expenses, correspond with the NASDAQ-100 Index's performance. In addition, options, futures and structured products based on the NASDAQ-100 Index and the PowerShares QQQ Trust trade on various exchanges.