Domestic Substances List Amended

Summary#

Order 2025-66-03-01 Amending the Domestic Substances List updates the federal Domestic Substances List under the Canadian Environmental Protection Act, 1999. It adds several substances to Part 1, removes and revises many entries in Part 3, and took effect on February 28, 2025 (registered); it was published on March 12, 2025.

What it does#

• Adds the following substances to Part 1 of the List (CAS numbers shown as in the order):

  • 77045-85-3 N
  • 93890-50-7 T
  • 94681-93-3
  • 125623-38-3 T
  • 155443-29-1 N-P
  • 224048-33-3 N-P
  • 224622-34-8 T
  • 241483-16-9 N
  • 300711-92-6 N
  • 388078-23-7 N-P
  • 600732-19-2 N
  • 1078715-83-9 N

• Deletes a set of substances from Part 3 of the List. The order lists specific CAS numbers and chemical names that are removed from Part 3 (the notice gives the full list).

• Updates or replaces the descriptive text (the entry in column 2) for many substances listed in Part 3. For example:

  • The reference 13809-3 N-P is changed to 13809-3 N.
  • Several other CAS-numbered entries have their chemical names or polymer descriptions rewritten or clarified (the order shows the exact text replacements).

• States that the Order comes into force on the day it is registered (February 28, 2025).

• Notes that the Regulatory Impact Analysis Statement for this Order appears with a related order in the Canada Gazette.

Who's affected#

• Companies that make, import, sell or use the listed chemicals in Canada (manufacturers, importers and suppliers).
• Organizations that track or comply with chemical inventories and reporting rules, including environmental and health professionals.
• It is unclear from the Order itself whether or how individual consumer products will change; the specific business or product impacts depend on how each listed substance is used in commerce.

Why it matters#

• The Domestic Substances List is the federal list used to identify substances present in Canadian commerce. Changes to the List can affect which chemicals are subject to federal tracking, assessment or follow-up actions.
• Adding substances to Part 1, removing others from Part 3, and changing how substances are described can change which rules, notices or assessments apply to those chemicals in the future.
• Businesses that handle any of the named CAS numbers should check the full order and related regulatory documents to see if their reporting or compliance duties are affected.