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ChemAlliance
Information about EPA and OSHA regulations and compliance.
http://www.chemalliance.org/
U.S. Chemical Safety and Hazard Investigation Board
Independent federal agency of the U.S. Government responsible for investigating the causes of and preventing commercial and industrial hazardous materials accidents. Chemical Incident Reports Center (CIRC) is searchable on-line worldwide database of incident reports.
http://www.chemsafety.gov/