NFPA / RTK Guide
Free NFPA Quick Guide

A quick guide to the NFPA fire diamond and right-to-know labels.

Businesses must follow the National Fire Protection Association (NFPA) guidelines for marking locations with hazardous chemicals. Some workplaces also use these labels on chemical containers. This free NFPA guide explains the parts of the “fire diamond,” including colors, numbers, and their meanings.

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