What marking system allows for the identification of hazardous materials based on numerical ratings?

The NFPA 704 system is specifically designed to provide quick and easily recognizable information about the hazards associated with materials. This system employs a color-coded diamond shape with numerical ratings ranging from 0 to 4 in each of its four quadrants: health, flammability, reactivity, and specific hazards.

A rating of 0 indicates a material that poses no hazard, while a 4 signifies a serious hazard. This numerical rating system enables emergency responders, safety personnel, and anyone handling hazardous materials to quickly assess the risks involved and take appropriate safety measures. The clarity and standardized nature of this marking system are vital for effective communication in emergency situations, enhancing safety measures through immediate hazard identification.

In contrast, the GHS System (Globally Harmonized System) uses labels and symbols rather than numerical ratings; DOT Hazard Classification categorizes materials based on transport regulations without a specific numerical rating system; and HMIS (Hazardous Materials Identification System) involves a color-coded label with a numerical rating but is less widely recognized compared to NFPA 704.