How should the relative level of hazard severity be communicated on a chemical label?

The relative level of hazard severity on a chemical label is effectively communicated using signal words. Signal words such as "Danger" or "Warning" are prominently displayed to indicate the degree of hazard associated with a chemical. "Danger" signifies a more severe level of risk, while "Warning" indicates a less severe hazard. This standardized approach helps users quickly assess the potential risks and take appropriate precautions.

While color coding, the size of the label, and pictograms are also important elements of chemical labeling, they serve different purposes. Color coding can enhance visual recognition of hazards, pictograms provide specific visual cues regarding the types of hazards, and label size might vary for practical reasons but does not inherently convey hazard severity. Thus, signal words are the primary means for communicating the seriousness of the hazard on a label.