The NFPA 704 Diamond Explained

The distinct red, blue yellow, and white diamonds affixed to semi-trucks and chemical containers are one of the most identifiable warning signs—but what does it mean? Each color on the NFPA diamond represents a different type of hazard: blue for health hazards, red for flammability, yellow for instability, and white for special notes. The NFPA 704 hazard diamond quickly alerts employees or emergency responders to specific hazards present and what the level of risk is in the event of a spill, fire, or other kind of emergency situation.

This infographic from Creative Safety Supply explains the purpose of the NFPA diamond, reviews the NFPA 704 standard, and breaks down each element of an NFPA 704 label.

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