Which term indicates the severity of a chemical hazard?

Which term indicates the severity of a chemical hazard?

• A. GHS symbols
• B. NFPA ratings
• C. PEL values
• D. Lethal dose 50 values

Answer: (A)

The way hazard severity is communicated for chemicals is through standardized GHS symbols. The Globally Harmonized System uses pictograms to indicate the type of hazard and, with signal words like Danger or Warning and hazard statements, conveys how serious the hazard is. For example, the acute toxicity pictogram signals a high-severity danger. Other concepts don’t convey severity in the same standardized way: NFPA ratings are a quick internal risk metric for a specific setting, PEL values are about how much exposure is allowed rather than how dangerous the chemical is, and LD50 values are a toxicity measure from testing rather than a labeling system. So the term that indicates the severity of a chemical hazard is the GHS symbols.

The way hazard severity is communicated for chemicals is through standardized GHS symbols. The Globally Harmonized System uses pictograms to indicate the type of hazard and, with signal words like Danger or Warning and hazard statements, conveys how serious the hazard is. For example, the acute toxicity pictogram signals a high-severity danger. Other concepts don’t convey severity in the same standardized way: NFPA ratings are a quick internal risk metric for a specific setting, PEL values are about how much exposure is allowed rather than how dangerous the chemical is, and LD50 values are a toxicity measure from testing rather than a labeling system. So the term that indicates the severity of a chemical hazard is the GHS symbols.