There are many universities that either have MSDS’s on line or have links to sites. One of the best is the Vermont SIRI MSDS Archives at http://hazard.com/msds/

MSDS Solutions is also one of the best searchable MSDS libraries available online.  They are located at http://www.msdssolutions.com

Another source of MSDS’s is MSDS ONLINE at http://www.msdsonline.com/

The University of Kentucky offers, "Where to find MSDS on the Internet" at http://www.ilpi.com/msds/index.html

Biosafety MSDS’s can be found at http://www.hc-sc.gc.ca/main/lcdc/web/bmb/msds/index.html Categorizes the biosafety hazard levels of microorganisms.