Documents may also be found via the Agency Guidelines and Regulations Search Page

Consumer Product Safety Commission (CPSC):

• U.S. Code of Federal Regulations (CFR):
  • 16 CFR 1500 - Hazardous Substances and Articles; Administration and Enforcement Regulations
    
  
  
  • 16 CFR 1500.3 - Definitions (includes definitions for "hazardous substances", "toxic", etc.) [PDF]
  
  

  U.S. Department of Transportation (DOT) Regulations

• U.S. Code of Federal Regulations (CFR):
  • 49 CFR 172.101 - Hazardous Materials Table [PDF]
  • 49 CFR 173.132 - General Requirements for Shipments and Packagings: Class 6 Definitions (criteria for determining classifications of toxic materials) [PDF]
  • 49 CFR 173.133 - General Requirements for Shipments and Packagings: Assignment of packing group and hazard zones for Division 6.1 materials (poisons) [PDF]

U.S. Environmental Protection Agency, Office of Prevention, Pesticides and Toxic Substances (OPPTS)

• Health Effects Test Guidelines, OPPTS 870.1100: Acute Oral Toxicity (December 2002) [PDF]

Organisation for Economic Co-operation and Development (OECD)

• OECD Guideline for the Testing of Chemicals Number 420: Acute Oral Toxicity - Fixed Dose Method (December 17, 2001) [PDF]
• OECD Guideline for the Testing of Chemicals Number 423: Acute Oral Toxicity - Acute Toxic Class Method (Dec. 17, 2001) [PDF]
• OECD Guideline for the Testing of Chemicals Number 425: Acute Oral Toxicity - Up-And-Down Procedure (Mar. 23, 2006) [PDF]
• (OECD Test Guideline 401: Acute Oral Toxicity has been deleted)

United Nations

• Globally Harmonized System of Classification and Labelling of Chemicals (GHS), First Revised Edition, 2005 [PDF]