Initially published as a final rule in 2024, the updated Hazard Communication Standard has been two years in the making. This spring chemical manufacturers, importers and distributors were required to classify substances under new criteria and update labels and Safety Data Sheets (SDS). This includes a harmonized signal word, pictogram and hazard statement for each hazard class and category. Precautionary statements must also be provided.

This fall will bring changes for all who use chemicals in the workplace. By Nov. 20, 2026, employers must update labels, revise written hazard communication programs and retrain workers based on the updated SDS and labels. It is important to note that the classification criteria are different enough that some chemicals will change hazard categories. SDS will now have a specified 16-section format. Workers must be trained on the new labels and SDS to be sure that they can recognize and understand the information in its new format.

For more information on your responsibilities as an employer, see these
OSHA links:  

Laura Radke, MD
About the Author

Dr. Radke serves as Senior Medical Director of Workforce Health Occupational Health Services. She has a distinguished career in occupational medicine, having served in a variety of clinical and leadership roles.

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