Domestic Substances List Additions

Summary#

The federal government issued Order 2026-87-07-01 Amending the Domestic Substances List to add several substances to the Domestic Substances List under the Canadian Environmental Protection Act, 1999. The order was registered on June 5, 2026 and published in the Canada Gazette on June 17, 2026, so the changes are in force as of registration.

What it does#

• Adds these CAS numbers to Part 1 of the Domestic Substances List:
  • 623-53-0
  • 34398-05-5
  • 73038-32-1 (marked N‑P in the order)
  • 91001-61-5 (marked N‑P in the order)
  • 2561414-35-3
• Adds these entries to Part 3 of the Domestic Substances List:
  • 19371-9 — Carbamic acid, N-[3-[poly(substitutedalkyl)amino]propyl]-, 2-hydroxy-1-methylethyl ester, polymer with 2-hydroxypropyl N-[3-[poly(substitutedalkyl)amino]propyl]carbamate and polymethylenepolyphenylene isocyanate, 2-propoxyethanol-blocked
  • 19835-3 — Carbomonocyclicdisulfonic acid, [1,2-ethenediylbis[(3-sulfo-4,1-phenylene)imino[6-[(2-sulfoethyl)amino]-1,3,5 triazine-4,2-diyl]imino]], bis-, sodium salt (1:8)
  • 19836-4 — Alkanoic acid, substituted, polymer with disubstituted-ketone, metal salt (marked N‑P in the order)
• The order notes that the Minister of the Environment and the Minister of Health were satisfied that the listed substances had been manufactured or imported in Canada above the New Substances Notification threshold, and that the government’s assessment period had ended.
• The order says it “comes into force on the day on which it is registered” (registered June 5, 2026).

Who's affected#

• Companies that manufacture or import any of the listed substances into Canada.
• Suppliers, formulators and downstream users who handle these specific chemicals or polymers.
• Environmental and health regulators and their contractors who track existing substances.
• It is not clear from the order which specific industries (for example, coatings, adhesives, plastics, or specialty chemicals) will be most affected, because several entries are complex polymers or technical chemical names.

Why it matters#

• Being added to the Domestic Substances List generally means a substance is treated as an “existing” substance in Canada. That changes how that substance is handled under Canada’s chemicals rules, especially the requirement to submit New Substances notifications.
• For businesses: this can reduce the need to file new-substance notifications for these exact substances, although other regulatory obligations under the Canadian Environmental Protection Act, 1999 may still apply.
• For the public: the change records that these substances have been present in Canada at levels that triggered reporting, and it helps government and stakeholders keep track of chemicals in commerce.