Nine Substances Added to Domestic Substances List

Summary#

The federal government issued Order 2024-87-08-01 Amending the Domestic Substances List, which adds 9 chemicals and polymers to the Domestic Substances List. The order took effect on registration (October 15, 2024) and means those substances are no longer treated as “new” for pre-market notification under the federal new-substances rules.

What it does#

• Adds 9 substances to the Domestic Substances List:
  • 3 substances are added to Part 1 by their CAS Registry Numbers: 102782-61-6, 178462-89-0, 3034480-18-4.
  • 6 substances are added to Part 3 using masked names and Confidential Accession Numbers (CANs): 19733-1, 19734-2, 19735-3, 19737-5, 19738-6, 19741-9.
• The order was made under the Canadian Environmental Protection Act, 1999 and comes into force on registration (October 15, 2024).
• The government also separately moved 21 other substances from Part 3 to Part 1 (unmasking their identities) under a companion instrument, Order 2024-66-08-01.

Who's affected#

• The main people and groups affected are chemical manufacturers, importers, and companies that use or sell these specific substances in Canada.
• Suppliers and downstream users may notice the change because these substances are no longer classified as “new” for notification purposes under the New Substances Notification Regulations (Chemicals and Polymers).
• It is not clear from the order which specific industries (for example, coatings, plastics, adhesives) use each masked substance.

Why it matters#

• Practically, companies that already provided the required information and were assessed can now handle, import or manufacture these listed substances without going through the federal pre-market “new substance” notification process for them.
• The action does not impose new restrictions, costs, or approvals on businesses. The government says it does not mean the substances are endorsed as safe — it simply updates the inventory.
• The separate unmasking of 21 substances increases public transparency about what chemicals are present on Canada’s inventory.