New Substances Added to Domestic List

Summary#

Order 2025-87-04-01 Amending the Domestic Substances List adds a set of chemical substances to Canada’s official list of substances. The order was signed by Julie Dabrusin, Minister of the Environment, on August 27, 2025 and registered on August 29, 2025.

What it does#

• Adds several substances to Part 1 of the Domestic Substances List (a set of CAS numbers are listed in the order).
• Adds several named polymers and complex chemical substances to Part 3 of the Domestic Substances List (the order lists their chemical names and identifiers).
• States that the order comes into force on the day it was registered (the order was registered on August 29, 2025).

Who's affected#

• Companies that make, import or sell the listed chemicals in Canada.
• Canadian businesses that use these substances in products or manufacturing.
• Environmental and public-health groups who track chemical inventories and assessments.
• Government regulators who keep the national chemical inventory up to date.

It is not clear from the order itself what specific products or industries use each of these complex polymers and substances.

Why it matters#

• Being on the Domestic Substances List means a substance is officially recorded as present in Canada. In practice, that usually changes how the substance is treated under the Canadian Environmental Protection Act, 1999 (for example, substances not on the list are typically treated as “new” and face extra notification or assessment steps). The order itself simply updates the list.
• For businesses, the change can affect regulatory paperwork and when notifications or pre-market assessments are required.
• For the public and advocacy groups, additions to the list can prompt interest in whether the substances have been assessed for health or environmental risks; a linked Regulatory Impact Analysis Statement is published alongside related documents (see SOR/2025-176 for further analysis).