Five Substances Added to Domestic Substances List

Summary#

The federal government published Order 2025-87-09-01 Amending the Domestic Substances List: SOR/2025-183 under the Canadian Environmental Protection Act, 1999. The order adds several chemicals to the Domestic Substances List and took effect on the date it was registered (September 8, 2025).

What it does#

• Adds four entries to Part 1 of the Domestic Substances List:
  • 25986-77-0 (listed with code N‑P)
  • 42928-85-8 (listed with code N)
  • 68111-04-6 (listed with code N‑P)
  • 926031-36-9 (listed with code N‑P)
• Adds one entry to Part 3 of the Domestic Substances List:
  • 19791-9 — 2‑Propenoic acid, 2‑methyl-, ethylalkyl ester, polymer with alkenylcarbomonocycle, 2‑ethylhexyl 2‑propenoate and substitutedalkyl 2‑methyl‑2‑propenoate, substituted non‑metallate, tert‑Bu 2‑ethylalkaneperoxoate‑initiated (long polymer name as published)
• Confirms the order comes into force on the day it was registered (September 8, 2025).

Who's affected#

• Companies that manufacture or import the specific substances added to the Domestic Substances List, including people who recently declared they made or brought these substances into Canada.
• Businesses that use, formulate, or sell products containing these chemicals (industrial users, suppliers, distributors).
• Regulators and anyone tracking chemical inventories and reporting obligations under federal chemical rules, including those who follow the New Substances Notification Regulations (Chemicals and Polymers).

If it’s unclear whether a particular business or product is affected, they will need to check the exact CAS numbers or the DSL entries.

Why it matters#

• Being added to the Domestic Substances List generally means a substance is no longer treated as “new” under the law. That usually changes which notification, assessment, or testing steps are required before manufacture or import.
• For companies, this can simplify future imports or production of these specific substances. For regulators and the public, it updates which chemicals are recognized as existing in Canadian commerce.
• If you make, import, use, or sell chemicals, check the DSL entries and related guidance to see how your reporting and compliance duties may change.