Domestic Substances List Amendments

Summary#

Order 2025-87-03-01 Amending the Domestic Substances List updates Canada’s inventory of chemicals by adding a batch of specific substances and polymer entries. The order was made under the Canadian Environmental Protection Act, 1999 and came into force on February 28, 2025; it was published in the Canada Gazette on March 12, 2025. The order is signed by the Minister of the Environment, Steven Guilbeault.

What it does#

• Deletes one entry (CAS number 1232651-32-9) from Part 1 of the Domestic Substances List and then re-adds it with a different listing annotation.
• Adds these CAS numbers to Part 1: 4457-71-0; 39317-53-8; 141808-05-1; 1232651-32-9; 2854367-08-9. Each entry is given an “N” or “N‑P” code on the list.
• Adds a set of polymer and polymer-related substance descriptions to Part 3 of the List. These are long, technical polymer names (for example, various formaldehyde and alkenoic acid polymers and other polymer reaction products) and are each annotated “N” or “N‑P”.
• States that the Order comes into force on the day it was registered (February 28, 2025).

Who's affected#

• Companies that make, import, or use the specific chemicals or polymers listed.
• Chemical suppliers and downstream industrial users who handle these substances.
• Federal regulators and government staff who manage chemical inventories and assessments under the Canadian Environmental Protection Act, 1999.

If you are unsure whether a substance you use is on this update, the full list of CAS numbers and polymer descriptions is in the official Order.

Why it matters#

• The Domestic Substances List is Canada’s official inventory of chemicals in commerce. Being added to it changes how a substance is treated for regulatory screening and new-substance notifications.
• For businesses, the change can affect reporting and permitting obligations, and what regulators may expect when a substance is used or imported.
• For the public, the update signals that these specific substances have been formally recorded in Canada’s chemical inventory, which affects how they may be monitored or assessed under federal environmental law.