Domestic Substances List Amended

Summary#

The government registered Order 2025-87-07-01 Amending the Domestic Substances List under the Canadian Environmental Protection Act, 1999. The order adds several chemical substances to the Domestic Substances List and came into force on August 29, 2025 (registration date); it was published in the Canada Gazette on September 10, 2025.

What it does#

• Adds the following CAS numbers to Part 1 of the Domestic Substances List: 1120-71-4, 19045-79-5.
• Removes the listing “1120-71-4 S′” from the note for “Group B” in Part 2.
• Adds 8 entries to Part 3 of the Domestic Substances List (CAS number — substance name):
  • 19774-2 — Alkenoic acid, polymer with α-(2-methyl-2-propen-1-yl)-ω-hydroxypoly(oxy-1,2-ethanediyl)
  • 19775-3 — 1,3-Benzenedicarboxylic acid, polymer with 1,4-benzenedicarboxylic acid, 1,3-dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid, 1,2-ethanediol, 2-ethylhexyl-2-propenoate, α,α′-[(1-methylethylidene)di-4,1-phenylene]bis[ω-hydroxypoly(oxy-1,2-ethanediyl)], α,α′-[(1-methylethylidene)di-4,1-phenylene]bis{ω-hydroxypoly[oxy(methyl-1,2-ethanediyl)]}, alkyl alkyl-alkenoate and 2-methyl-2-propenoic acid
  • 19776-4 — Carboxylic acids, di, C10-14, polymer with alkyl fatty acids, C2-6 α,ω-glycols, 1,10-decanediol and 1,12-dodecanediol
  • 19777-5 — Hexanedioic acid, polymer with chlorinated oxirane polymer with 4,4′-(1-methylethylidene) bis[phenol] 2-propenoate, 1,6-hexanediol, 3-hydroxy-2-(hydroxymethyl)-2-methylpropanoic acid and 5-isocyanato-1-(isocyanatomethyl)-1,3,3-trimethylcyclohexane, compd. with N,N-diethylethanamine
  • 19778-6 — 1,3-Benzenedicarboxylic acid, polymer with 1,3-dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid, 2,2-dimethyl-1,3-propanediol and alkanediol
  • 19780-8 — Ethanaminium, 2-[3-(dioxoheteromonocycle)propoxy]-N,N,N-trimethyl-, monopolyisobutylene derivs., Me oxalates
  • 19781-9 — 2-Propenoic acid, 2-methyl-, telomer with alkyl alkenoate, ethenylbenzene, alkylalkyl 2-substituted acetate, 2-hydroxyethyl 2-methyl-alkenoate and methyl 2-methyl-alkenoate
  • 19782-0 — Polysaccharide, regenerated

Who's affected#

• Chemical manufacturers and importers in Canada that make, sell, or bring in any of the listed substances.
• Companies that use these substances in products (downstream users).
• Federal regulators responsible for chemical assessment and tracking — the action was taken by the Minister of the Environment, Julie Dabrusin.
• The general public and environmental groups may be affected indirectly through changes in how these substances are tracked or assessed. If it is unclear whether a particular business or product is affected, they should check the exact CAS numbers against their ingredient lists.

Why it matters#

• Being added to the Domestic Substances List signals that these chemicals are treated as existing in Canada’s inventory. In practice, that can change which regulatory notifications or assessments are needed when the substances are manufactured or imported.
• The order reflects a government decision about how these specific substances are listed after assessment steps described under the Canadian Environmental Protection Act, 1999.
• Businesses that work with these CAS numbers may need to update their compliance checks and reporting to match the new listing.