In late September, Health Canada published a document entitled Threshold of Toxicological Concern (TTC) based Approach for Certain Substances.


Out of 1,500 substances that were remaining on the priority substances list, Health Canada identified 237 substances that will be addressed in the third phase of the Chemicals Management Plan (CMP). Using the TTC based Approach, the aim was to identify substances that were not previously evaluated by rapid screening. The TTC identified 89 Subst