Which color on the NFPA 704 diamond signifies flammability?

• A. Red
• B. Blue
• C. Yellow
• D. White

Answer: (A)

The NFPA 704 diamond, also known as the Fire Diamond, is used to convey the hazards associated with materials in a clear and easily understandable way. Within this system, each color represents a different type of hazard. The color red specifically denotes flammability. This means that when you see red on the diamond, it indicates the material's potential to ignite and burn. The number assigned within the red section indicates the degree of flammability, where a higher number signifies a greater hazard. Understanding this color coding is essential for first responders and those handling hazardous materials, as it guides them on the appropriate precautions and actions to take in case of an incident.