In the NFPA 704 system, what does the red section indicate?

In the NFPA 704 system, the red section specifically indicates flammability. This color coding is part of a standardized system used to quickly communicate the hazards associated with materials. The flammability rating provides first responders and others with immediate information regarding a material’s susceptibility to catching fire and the intensity of the fire hazard it represents.

The scale typically ranges from 0 (meaning not flammable) to 4 (indicating extremely flammable), allowing for quick assessments in emergency situations. For example, a material rated as 4 would ignite easily and burn rapidly, requiring special precautions when handling or storing the material. Understanding the significance of the red section is crucial for ensuring safety during a response to incidents involving hazardous materials.