Check out HESI's breaking news

The 2016-2017 Annual Activities Report with updates from all 15 HESI Scientific Committees and more is now available!

HESI 2016-2017 Activities Report cover

New HESI RISK21 Website!

Visit to learn more about the HESI RISK21 program’s upcoming events, new publications, and ongoing efforts to harmonize the approach to how the world evaluates chemicals using a risk-based approach.

Featured Workshops & Meetings

DART CLP-CMP Workshop: Satellite Meeting to ETS Annual Meeting

The workshop will discuss the best practices to achieve a consistent and accurate classification regarding developmental toxicity, in particular within the REACH, biocides or pesticide regulations. For more information, visit the HESI website here.


Join HESI for a lunchtime lecture presented by Dr. Louise Horsfall, University of Edinburgh, UK , “Synthetic biology tools in biology and toxicology.” Monday 11 September, 13:00-14:00. Learn more here.

Read the newest HESI Fact Sheet!