NFPA (Fire) 400 ✓ Most Recent

Your source for specialized knowledge to help protect workers, communities, and emergency responders.

NFPA 400, Hazardous Materials Code, provides the newest safety information for any facility or occupancy that stores, handles, or uses one or more of the covered classes of hazardous materials. It also includes requirements for materials that are classified as unstable/reactive, water reactive, corrosive, pyrophoric, toxic, or flammable. NFPA 400 consolidates the requirements for oxidizers, organic peroxides, pesticides, and ammonium nitrate based on requirements from these previous stand-alone documents:

• NFPA 430, Code for the Storage of Liquid and Solid Oxidizers
• NFPA 432, Code for the Storage of Organic Peroxide Formulations
• NFPA 434, Code for the Storage of Pesticides
• NFPA 490, Code for the Storage of Ammonium Nitrate

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)