On June 17, 2022, Canada published its draft Framework for the Risk Assessment of Manufactured Nanomaterials under the Canadian Environmental Protection Act, 1999 (CEPA) for a 60-day public comment period. The plain language summary states that the framework describes how scientists at Environment and Climate Change Canada (ECCC) and Health Canada (HC) conduct risk assessments on nanomaterials. The draft risk assessment framework outlines approaches and considerations for informing the risk assessment of nanomaterials under CEPA, including both existing nanomaterials on the Domestic Substances List (DSL) and new nanomaterials notified under the New Substances Notification Regulations (Chemicals and Polymers). A substance is assessed as a nanomaterial if it meets the criteria described in HC’s working definition for nanomaterial and particle size distribution threshold (number or mass-based), as stated in both the draft framework and the New Guidance Document for the notification and testing of new substances: chemicals and polymers. Comments are due August 16, 2022.
The framework discusses in detail the nanomaterial-specific considerations for risk assessment, including:
- The key physical and chemical properties specific for nanomaterial identification and used for grouping or classifying nanomaterials for information gathering;
- The data considerations used in a nanomaterial risk assessment, such as test data or modeling; and
- The behavior of nanomaterials throughout the life cycle of the nanomaterial (from production to disposal) and characterizing those potential effects on human health and the environment.
Nano and Other Emerging Chemical Technologies Blog, 21-06-22