What is a major requirement of the GHS regarding hazard labeling?

The major requirement of the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) regarding hazard labeling is that labels must include specific information presented in a standardized format. This includes the use of signal words, hazard statements, precautionary statements, and symbols (pictograms) that convey the nature of the hazards associated with the chemicals. The requirement emphasizes clarity and comprehensibility in hazard communication.

By stating that labels must contain single wording, it aligns with the GHS's focus on clear and concise communication. However, the actual requirement extends beyond just having "single wording" - it is essential for labels to effectively communicate the relevant hazards without ambiguity, ensuring that users can readily understand the risks.

Options like requiring labels to be in multiple languages or printed in red, while potentially enhancing communication, are not specified requirements of GHS. Similarly, the inclusion of QR codes is a modern innovation but not a foundational GHS requirement. The focus is primarily on the standardization of hazard communication through specific language and symbols, making the clarity of information paramount.