Nineteen substances on the Domestic Substances List associated with pesticidal uses

What are they?

  • This assessment is for nineteen substances on the Domestic Substances List (DSL) that are only associated with pesticidal uses.
  • All nineteen substances in this screening assessment are regulated by Health Canada as active ingredients in pesticides under the Pest Control Products Act (PCPA).

How are they used?

  • These nineteen substances are used in Canada only as pesticides.

Why is the Government of Canada assessing them?

  • The nineteen substances in this screening assessment were prioritized for assessment following categorization of the DSL under the Canadian Environmental Protection Act, 1999.
  • Screening assessments address the potential for harm to the general population of Canada and the environment.

How are Canadians exposed to them?

  • There are no reports of current uses in Canada other than pesticide applications regulated under the PCPA for these nineteen substances.

How is it released to the environment?

  • Any releases to the environment from pesticidal uses associated with these nineteen substances have been assessed under the PCPA. No non-pesticidal releases have been identified.

What are the results of the assessment?

  • The Government of Canada has conducted a science-based evaluation of these nineteen substances, called a screening assessment.
  • Screening assessments address potential for harm to the general population of Canada and the environment
  • Given that no non-pesticidal uses have been identified for these substances, the likelihood of exposure to these substances in Canada and potential for harm to humans or the environment is low.
  • The Government of Canada has therefore concluded that these nineteen substances on the DSL associated with pesticide uses are not entering the environment at levels that constitute a danger to the environment.
  • The Government of Canada has also concluded that these nineteen substances on the DSL associated with pesticide uses are not harmful to human health at current levels of exposure.
  • Hazards related to chemicals used in the workplace should be classified accordingly under the Workplace Hazardous Materials Information System (WHMIS).

What is the Government of Canada doing?

  • The Government of Canada published the Final Screening Assessment of Nineteen Substances on the Domestic Substances List Associated with Pesticidal Uses on October 15, 2016.
  • Although a risk to human health or the environment has not been identified under current non-pesticidal use patterns, there may be a concern for human health or the environment if new, non-pesticidal uses of these nineteen substances were introduced in Canada.
  • Therefore, the application of the Significant New Activity (SNAc) provisions to these substances is being proposed. This action would require that any new manufacture, use or import of the substances be subject to further assessment to determine if the new activity requires further risk management consideration.
  • Stakeholders have the opportunity to provide feedback on the Notice of intent to apply SNAc provisions to these nineteen substances during the 60-day public comment period.
  • Health Canada, as required under the Pest Control Products Act, re-evaluates all products on a 15 year cycle, to assess the human health and environmental risks according to latest health and environmental risk assessment standards.

What can Canadians do?

  • The health risks associated with a chemical depend on the hazard (its potential to cause health effects) and the amount of chemical to which a person is exposed.
  • As a general precaution, Canadians are reminded when using any product, to carefully follow safety warnings and directions and to dispose of the products appropriately.
  • Canadians who may be exposed to these substances in the workplace should consult with their employer and occupational health and safety (OHS) representative about safe handling practices, applicable laws and requirements under the OHS legislation and the Workplace Hazardous Materials Information System (WHMIS).
Nineteen substances on the DSL associated with pesticidal uses assessed by the Government of Canada
CAS RN DSL Name
51-03-6 1,3-Benzodioxole, 5-[[2-(2-butoxyethoxy)ethoxy]methyl]-6-propyl-
62-73-7 Phosphoric acid, 2,2-dichloroethenyl dimethyl ester
76-06-2 Methane, trichloronitro-
87-90-1 1,3,5-Triazine-2,4,6(1H,3H,5H)-trione, 1,3,5-trichloro-
88-30-2 Phenol, 4-nitro-3-(trifluoromethyl)-
94-75-7 Acetic acid, (2,4-dichlorophenoxy)-
133-06-2 1H-Isoindole-1,3(2H)-dione, 3a,4,7,7a-tetrahydro-2-[(trichloromethyl)thio]-
133-07-3 1H-Isoindole-1,3(2H)-dione, 2-[(trichloromethyl)thio]-
333-41-5 Phosphorothioic acid, O,O-diethyl O-[6-methyl-2-(1-methylethyl)-4-pyrimidinyl] ester
584-79-2 Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methyl-1-propenyl)-, 2-methyl-4-oxo-3-(2-propenyl)-2-cyclopenten-1-yl ester
2921-88-2 Phosphorothioic acid, O,O-diethyl O-(3,5,6-trichloro-2-pyridinyl) ester
8001-58-9 Creosote
8003-34-7 Pyrethrins and Pyrethroids
10453-86-8 Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methyl-1-propenyl)-, [5-(phenylmethyl)-3-furanyl]methyl ester
10605-21-7 Carbamic acid, 1H-benzimidazol-2-yl-, methyl ester
12069-69-1 Copper, [µ-[carbonato(2-)-O:O']]dihydroxydi-
13356-08-6 Distannoxane, hexakis(2-methyl-2-phenylpropyl)-
20543-04-8 Octanoic acid, copper salt
23564-05-8 Carbamic acid, [1,2-phenylenebis(iminocarbonothioyl)]bis-, dimethyl ester
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