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NFPA 400: Hazardous Materials Code, 2025
- Important Notices and Disclaimers
- Additional Important Notices and Disclaimers
- Chapter 1 Administration [Go to Page]
- 1.1 Scope.
- 1.2 Purpose.
- 1.3 Application.
- 1.4 Retroactivity.
- 1.5 Equivalency.
- 1.6 Units and Formulas.
- 1.7 Enforcement.
- 1.8 Permits.
- 1.9 Facility Closure.
- 1.10 Emergency Planning.
- 1.11 Hazardous Materials Management Plan (HMMP).
- 1.12 Hazardous Materials Inventory Statement (HMIS).
- 1.13 Plan Review.
- 1.14 Technical Assistance.
- Chapter 2 Referenced Publications [Go to Page]
- 2.1 General.
- 2.2 NFPA Publications.
- 2.3 Other Publications.
- 2.4 References for Extracts in Mandatory Sections.
- Chapter 3 Definitions [Go to Page]
- 3.1 General.
- 3.2 NFPA Official Definitions.
- 3.3 General Definitions.
- 3.4 Special Performance-Based Definitions.
- Chapter 4 Classification of Materials, Wastes, and Hazard of Contents [Go to Page]
- 4.1 Hazardous Material Classification.
- 4.2 Classification of High-Hazard Contents.
- 4.3 Mixtures.
- 4.4 Multiple Hazards.
- 4.5 Classification of Waste.
- 4.6 Toxicity of Gas Mixtures.
- 4.7 Flammability of Gas Mixtures.
- 4.8 Combustibility of Materials.
- 4.9 Classification of Ignitible (Flammable or Combustible) Liquids.
- Chapter 5 Permissible Storage and Use Locations [Go to Page]
- 5.1 General.
- 5.2 Control Areas.
- 5.3 Protection Levels.
- 5.4 Outdoor Areas.
- Chapter 6 Fundamental Requirements [Go to Page]
- 6.1 General Requirements.
- 6.2 Requirements for Occupancies Storing Quantities of Hazardous Materials Exceeding the Maximum Allowable Quantities per Control Area for High-Hazard Contents.
- 6.3 Requirements for Use, Dispensing, and Handling of Hazardous Materials in Amounts Exceeding Maximum Allowable Quantities.
- Chapter 7 Emergency Planning, Fire Risk Control, and Chemical Hazard Requirements for Industrial Processes [Go to Page]
- 7.1 General.
- 7.2 Process Review and Plan Preparation.
- 7.3 Operating and Maintenance Procedures.
- 7.4 Safety Reviews.
- 7.5 Incident Investigation Plan.
- 7.6 Document Retention.
- Chapter 8 Reserved
- Chapter 9 Security for Hazardous Materials [Go to Page]
- 9.1 General.
- Chapter 10 Performance-Based Option [Go to Page]
- 10.1 General.
- 10.2 Performance Criteria.
- 10.3 Retained Prescriptive Requirements.
- 10.4 Design Scenarios.
- 10.5 Evaluation of Proposed Designs.
- 10.6 Safety Factors.
- 10.7 Documentation Requirements.
- Chapter 11 Ammonium Nitrate Solids, Liquids, and Emulsions [Go to Page]
- 11.1 General.
- 11.2 General Requirements for Storage.
- 11.3 Indoor Storage.
- 11.4 Outdoor Storage.
- 11.5 General Requirements for Use.
- 11.6 Indoor Use.
- 11.7 Outdoor Use.
- 11.8 Handling.
- Chapter 12 Corrosive Solids and Liquids [Go to Page]
- 12.1 General.
- 12.2 General Requirements for Storage.
- 12.3 Indoor Storage.
- 12.4 Outdoor Storage.
- 12.5 General Requirements for Use.
- 12.6 Indoor Use.
- 12.7 Outdoor Use.
- 12.8 Handling.
- Chapter 13 Flammable Solids [Go to Page]
- 13.1 General.
- 13.2 General Requirements for Storage.
- 13.3 Indoor Storage.
- 13.4 Outdoor Storage.
- 13.5 General Requirements for Use.
- 13.6 Indoor Use.
- 13.7 Outdoor Use.
- 13.8 Handling.
- Chapter 14 Organic Peroxide Formulations [Go to Page]
- 14.1 General.
- 14.2 General Requirements for Storage.
- 14.3 Indoor Storage.
- 14.4 Outdoor Storage.
- 14.5 General Requirements for Use.
- 14.6 Indoor Use.
- 14.7 Outdoor Use.
- 14.8 Handling.
- Chapter 15 Oxidizer Solids and Liquids [Go to Page]
- 15.1 General.
- 15.2 General Requirements for Storage.
- 15.3 Indoor Storage.
- 15.4 Outdoor Storage.
- 15.5 General Requirements for Use.
- 15.6 Indoor Use.
- 15.7 Outdoor Use.
- 15.8 Handling.
- Chapter 16 Reserved
- Chapter 17 Pyrophoric Solids and Liquids [Go to Page]
- 17.1 General.
- 17.2 General Requirements for Storage.
- 17.3 Indoor Storage.
- 17.4 Outdoor Storage.
- 17.5 General Requirements for Use.
- 17.6 Indoor Use.
- 17.7 Outdoor Use.
- 17.8 Handling.
- Chapter 18 Toxic or Highly Toxic Solids and Liquids [Go to Page]
- 18.1 General.
- 18.2 General Requirements for Storage.
- 18.3 Indoor Storage.
- 18.4 Outdoor Storage.
- 18.5 General Requirements for Use.
- 18.6 Indoor Use.
- 18.7 Outdoor Use.
- 18.8 Handling.
- Chapter 19 Unstable (Reactive) Solids and Liquids [Go to Page]
- 19.1 General.
- 19.2 General Requirements for Storage.
- 19.3 Indoor Storage.
- 19.4 Outdoor Storage.
- 19.5 General Requirements for Use.
- 19.6 Indoor Use.
- 19.7 Outdoor Use.
- 19.8 Handling.
- Chapter 20 Water-Reactive Solids and Liquids [Go to Page]
- 20.1 General.
- 20.2 General Requirements for Storage.
- 20.3 Indoor Storage.
- 20.4 Outdoor Storage.
- 20.5 General Requirements for Use.
- 20.6 Indoor Use.
- 20.7 Outdoor Use.
- 20.8 Handling.
- Chapter 21 Storage, Use, and Handling of Compressed Gases and Cryogenic Fluids [Go to Page]
- 21.1 General Provisions.
- 21.2 Building-Related Controls.
- 21.3 Compressed Gases.
- 21.4 Cryogenic Fluids.
- 21.5 Bulk Oxygen Systems.
- 21.6 Hydrogen Compressed Gas Systems.
- 21.7 Bulk Liquefied Hydrogen Systems.
- 21.8 Gas Generation Systems.
- 21.9 Insulated Liquid Carbon Dioxide Systems.
- 21.10 Storage, Handling, and Use of Ethylene Oxide for Sterilization and Fumigation.
- 21.11 Acetylene Cylinder Charging Plants.
- 21.12 Nitrous Oxide Systems.
- 21.13 Cryogenic Fluid Central Supply Systems for Health Care Facilities.
- Annex A Explanatory Material
- Annex B Chemical Data
- Annex C Hazardous Materials Management Plans and Hazardous Materials Inventory Statements
- Annex D Security Information
- Annex E Properties and Uses of Ammonium Nitrate and Firefighting Procedures
- Annex F Typical Organic Peroxide Formulations
- Annex G Oxidizers
- Annex H Compressed Gases and Cryogenic Fluids
- Annex I Emergency Response Guideline
- Annex J Hazardous Material Definitions Comparison Table
- Annex K Sample Ordinance for Adopting NFPA 400
- Annex L Informational References [Go to Page]
