NFPA 704

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Standard System for the Identification of the Hazards of Materials for Emergency Response

This standard presents a simple, readily recognized, and easily understood system of markings (commonly referred to as the "NFPA hazard diamond") that provides an immediate general sense of the hazards of a material and the severity of these hazards as they relate to emergency response.

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NFPA members and public sector officials may submit a question on an NFPA code or standard. Responses are provided by NFPA staff on an informal basis.

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