NFPA 400 PDF

Highlights

The 2025 edition features the latest information from the field to help ensure an adequate level of fire protection, including:
New requirements and definition for ammonium nitrate emulsion (ANE)
New section on the properties of ammonium nitrate emulsions
Updated tables to include the CAS numbers for oxidizers
New Hazardous Material Definitions Comparison Table to include material definitions found in the Hazard Communication Standard (Rev 7) from the Occupational Safety and Health Administration (OSHA)

Table of Contents

NFPA® 400 Hazardous Materials Code 2025 Edition
Chapter 1 Administration
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
2.1 General.
2.2 NFPA Publications.
2.3 Other Publications.
2.4 References for Extracts in Mandatory Sections.
Chapter 3 Definitions
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
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
5.1 General.
5.2 Control Areas.
5.3 Protection Levels.
5.4 Outdoor Areas.
Chapter 6 Fundamental Requirements
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
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
9.1 General.
Chapter 10 Performance-Based Option
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
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
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
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
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
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
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
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
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
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
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