Additions to the Domestic Substances List

Summary#

This Order — Order 2023-87-05-01 Amending the Domestic Substances List — adds a set of chemical substances to the Domestic Substances List under the Canadian Environmental Protection Act, 1999. The Order was registered on April 18, 2023 and published in the Canada Gazette on May 10, 2023.

What it does#

• Adds several substances to Part 1 of the Domestic Substances List (these are listed by their chemical identifiers/CAS numbers).
  • 25035-78-3 N-P
  • 72415-44-2 N-P
  • 86020-50-0 N-P
  • 165809-91-6 N-P
  • 1661825-16-6 N-P
  • 2484820-75-7 N-P
• Adds several substances to Part 3 of the Domestic Substances List, including some with descriptive chemical names and CAS-like numbers:
  • 19498-6 N — Propanoic acid, 2-hydroxy-, (2S)-, compds. with hydrolyzed α-(2-oxiranylmethyl)-ω-(2-oxiranylmethoxy)poly(oxy-1,4-butanediyl)-polypropylene glycol diamine polymer-2-[[(polyalkoxysilyl)propoxy]methyl]oxirane reaction products
  • 19648-6 N-P — 2-Propenoic acid, 2-methyl-, 2-alkylalkyl ester, polymer with ethenylbenzene, 2-hydroxyalkyl 2-methyl-2-propenoate, 2-alkylalkyl 2-methyl-2-propenoate, 1,2-propanediol mono(2-methyl-2-propenoate), 2-propenoic acid, tert-Bu 2-ethylhexaneperoxoate- and tert-Bu peroxide-initiated
  • 19649-7 N-P — Fatty acids, C18-unsatd., dimers, hydrogenated, polymers with adipic acid, 1,4-cyclohexanedimethanol, 1,6-hexanediol, 3-substituted-2-(substitutedalkyl)-2-alkylpropanoic acid, 5-isocyanato-1-(isocyanatomethyl)-1,3,3-trimethylcarbomonocycle and alkylenebis[isocyanatocarbomonocycle]
  • 19650-8 N-P — Reaction product of formaldehyde, polymer with branched alkylphenol and toluene diisocyanate
  • 19651-9 N-P — 2-Alkenoic acid, 2-methyl-, 1,1’-anhydride, polymer with butyl 2-propenoate, ethenylbenzene, 2-ethylhexyl 2-propenoate, 2-hydroxyethyl 2-methyl-2-propenoate, methyl 2-methyl-2-propenoate and 2-propenoic acid, tert-Bu 2-ethylhexaneperoxoate-initiated, compds. with 2-(dimethylamino)-ethanol
  • 19652-0 N-P — Alkanedioic acid, polymer with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, oxoheteromonocycle and oxybis[alkanol]
  • 19653-1 N-P — Substituted benzenediamine, reaction products with maleated modified polyalkene
• The Order records that the Ministers reviewed information showing these substances were manufactured or imported into Canada above the reporting thresholds in the New Substances Notification Regulations (Chemicals and Polymers). The assessment period expired and no conditions were in effect when the Order was made.
• The Order came into force on the day it was registered (April 18, 2023).

Who's affected#

• Companies that manufacture or import chemicals in Canada, especially those that provided the information to the government about these substances.
• Chemical suppliers, formulators, and downstream users who handle or sell the specific substances named in the Order.
• The federal health and environment officials involved in chemical assessment (the Order references actions by the Minister of the Environment and the Minister of Health).

Why it matters#

• Being added to the Domestic Substances List is an official recognition that a substance has a Canadian history of manufacture or import above the reporting threshold.
• That status changes how the substance is treated under Canada’s new-substance rules. In practical terms, businesses dealing only with these exact listed substances are typically not treated as introducing a “new” substance for the purposes of the New Substances Notification regime.
• For the public, this affects which chemicals are tracked and assessed by federal regulators. It can influence product availability, regulatory checks, and the focus of future health or environmental reviews.