Substance 321657-09-4 Added to Domestic List

Summary#

This notice records that the Minister of the Environment has moved the chemical identified by CAS number 321657-09-4 from the Non‑domestic Substances List to the Domestic Substances List under the Canadian Environmental Protection Act, 1999. The change is made by Order 2025-87-10-02 Amending the Non-domestic Substances List, signed October 23, 2025, and it comes into force on the day Order 2025-87-10-01 Amending the Domestic Substances List comes into force.

What it does#

• Deletes 321657-09-4 from Part I of the Non‑domestic Substances List.
• Indicates the Minister has added that same substance to the Domestic Substances List under the Canadian Environmental Protection Act, 1999.
• Sets the effective date to the day Order 2025-87-10-01 Amending the Domestic Substances List comes into force (the notice does not give that specific date).

Who's affected#

• Businesses that make, import, sell or use the substance identified as 321657-09-4 in Canada.
• Regulators and government staff who track and assess chemical substances under the Department of the Environment.
• Community groups, health or environmental organizations monitoring chemical inventories.
• The public — but the notice does not give a common name, uses, or quantities for the substance, so it’s unclear which specific products or industries are involved.

Why it matters#

• Being moved onto the Domestic Substances List signals the substance is now recorded as present in Canadian commerce.
• That change can affect how the federal government monitors, assesses or prioritizes the substance for further action.
• For companies, the change may alter which federal reporting or review processes apply; for communities, it may influence whether the substance is studied or regulated — the notice itself does not list any specific new requirements or uses.