Occupational Safety and Health Administration (OSHA)

Department of Tranpsortation (DOT)
Office of Hazardous Materials Safety

DOT Emergency Response Guidebook

Environmental Protection Agency (EPA)

U.S. Government Code of Federal Regulations

NIOSH Pocket Guide to Chemical Hazards

NIOSH Pocket Guide to Chemical Hazards (Spanish)

NTP Chemical Health & Safety Data

NFPA Chemical Hazard Labels

Chemical Safety Information at Oxford University

ATSDR ToxFAQs