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NFPA 704 Diamond Information

The NFPA diamond, also known as the "fire diamond" or RTK diamond, is a requirement of the NFPA 704 standard. It was originally designed to provide quick notification to emergency personnel of potential chemical reactions and risks. The NFPA 704 diamond is readily recognized, and is often used as an indicator for plant and employee safety as well. The blank NFPA diamond is referenced below:



The NFPA diamond is divided into four regions. The four divisions are color-coded, with blue indicating the level of health hazard, red indicating flammability, yellow indicating chemical reactivity, and white containing special codes for unique hazards. Each of the health, flammability and reactivity ratings is numbered on a scale from 0 (no hazard / normal substance) to 4 (severe risk).

  • More information on the BLUE NFPA DIAMOND segment
  • More information on the RED NFPA DIAMOND segment
  • More information on the NFPA DIAMOND YELLOW segment
  • More information on the NFPA DIAMOND WHITE segment
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