Domestic Substances List entries get -P suffix

Summary#

Order 2024-66-03-01 Amending the Domestic Substances List: SOR/2024-57 is a federal order that updates how a long list of chemicals appears on the Domestic Substances List. It replaces many existing entries with versions that add a “-P” suffix (for example, changing “T” or “N” entries to “T‑P” or “N‑P”). The order was made under the Canadian Environmental Protection Act, 1999 and came into force on April 11, 2024. Steven Guilbeault is the Minister who registered the order.

What it does#

• Removes a set of chemical entries from Part 1 of the Domestic Substances List and re-adds them in the same numeric order but with the suffix -P added to their codes (many CAS numbers are affected).
• Replaces numerous references in Part 3 of the List by adding -P to those entries (again, many numbered references are changed).
• The order itself does not include an explanation of what the -P suffix means or what downstream regulatory consequences follow.
• The order came into force on April 11, 2024.

Who's affected#

• Businesses that make, import, sell or use the specific chemicals named by CAS number in the order are most likely to notice the change.
• Government staff and consultants who track chemical inventories or regulatory status will also be affected.
• The order does not explain how regulatory duties, reporting, or restrictions (if any) change as a result, so the exact practical impacts on different groups are not spelled out in the text.

Why it matters#

• The Domestic Substances List is the official federal list that shows how certain chemicals are recorded for Canada. Changing how a substance is listed can affect how regulators and companies track and manage it.
• Because the order does not explain the meaning of -P or the resulting obligations, anyone connected to the listed chemicals should look for further guidance from the federal government or seek regulatory advice to understand whether their reporting or compliance duties have changed.