Chemfinder.com Comprehensive
lookup facility.
The Aldrich online catalog contains the same information as the print catalog. Can search by name, molecular formula, registry number (omit the dashes). Can also search by structure (requires downloading a structure drawing plugin). When searching try several variations of the chemical name. This site also contains a link to Aldrichimica Acta
Biosafety
in Biomedical and Microbiological Laboratories
Biosafety
Hazards
Safety manual
guidelines for biological material