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NFPA Identification System  

The National Fire Protection Association (NFPA) is a non-profit organization devoted to eliminating death, injury, property and economic loss due to fire, electrical and related hazards.

The NFPA hazard diamond is a commonly used standard of identification of the hazards of chemicals and materials.


The easily read visual details help emergency first responders quickly identify the hazardous chemical, by using the rating numbers and symbols.


Learn more about NFPA at


NFPA Placards, Signs, Tags and Labels

Click on the image below to view category.

Understanding the NFPA 704 Diamond 

This is diamond-shaped NFPA 704 style sign with four smaller quadrants inside. One diamond is blue, one is red, one is yellow and one is white. The diamond-shaped signs use the four color-coded categories identify the hazards that personnel or observers are exposed to in any specific area with just a quick visual inspection of the sign diamond.


The image to the right shows the different colored sections and what they represent.

Recommended Viewing Distance 


The size of the diamond and the associated numbers and symbols is dependent on the distance at which the hazard ratings can be safely viewed in the event of an accident.


According to the NFPA 704 Standard, a ratio of 25 feet of viewing distance per inch of text should be used to determine the minimum text size required, up to 100 feet.

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