Agency for Toxic Substances and Disease Registry (ATSDR) American Chemistry Council American Chemistry Council - Chlorine American Chemical Society American Association of Railroads American Association of Railroads - TTCI Center American Board of Industrial Hygiene American Conference of Governmental Industrial Hygienists American Industrial Hygiene Association American National Standards Institute American Petroleum Institute (API) American Red Cross  American Society for Testing and Material American Trucking Association Association of American Railroads (AAR) CCOHS - Canadian Centre for Occupational Health and Safety  Chemical Hazards Communications Society Compressed Gas Association Dangerous Goods Advisory Council International Association of Fire Chiefs (IAFC)   International Association of Fire Fighters (IAFF) Intermodal Association of North America (IANA) International Maritime Organization (IMO) IUPAC (International Union of Pure and Applied Chemistry) National Association of Fire Equipment Distributors National Association of Rail Shippers National Fire Protection Association (NFPA) National Institutes of Health (NIH) National Institute for Occupational Safety Health (NIOSH) National Institute of Technology National Safety Council National Tank Truck Carriers (NTTC) Royal Society of Chemistry The Chlorine Institute, Inc. The U.S. Fire Administration World Health Organization