National Fire Protection Association (NFPA)

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US organization with international membership, it establishes and updates fire protection and prevention safeguards. NFPA publishes National Fire Codes, a 16-volume set of standards, manuals, and recommended practices. Its diamond-shaped label (issued under code NFPA-704M) placed on storage and shipping containers shows levels of possible hazards and is recognized the world over. This label is divided into four boxes which (starting clockwise from top) represent fire/explosion, chemical reactivity, special hazards, and health hazard (toxicity). Each box shows the level of hazard of the substance by a number ranging from 0 (not a hazard) to 4 (extremely hazardous).


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