NIH Office of Biotechnology Activities (OBA):

http://www4.od.nih.gov/oba/Index.htm

OBA's Recombinant DNA page:

http://www4.od.nih.gov/oba/rdna.htm

The NIH Guidelines for Research Involving Recombinant DNA Molecules:

 http://www4.od.nih.gov/oba/rac/guidelines/guidelines.html

The Centers for Disease Control (CDC),  Biosafety in Microbiological and Biomedical Laboratories (BMBL) 5th Edition:

http://www.cdc.gov/od/ohs/biosfty/bmbl5/bmbl5toc.htm

Public Health Agency of Canada, Material Safety Data Sheets:

http://www.phac-aspc.gc.ca/msds-ftss/index.html

SDSU's Environmental Health and Safety Office:

http://www3.sdstate.edu/Administration/EnvironmentalHealthandSafety/