19 Substances Removed from the Domestic Substances List (DSL)

 In Regulatory Affairs

By: Joe McCarthy, Lab Service Manager/Senior Regulatory Affairs Specialist, email

On March 17, 2021 the Ministry of the Environment published a notice removing 19 substances that are recognized to have hazardous properties from the Domestic Substances List (DSL) as there may be a concern for the environment or to human health if exposure to these substances from non-pesticidal applications was to increase.

A Significant New Activity (SNAc) Notice has been published for each of the substances that require for any activity, more than 100 kg/yr of the substance. Information regarding uses, quantities, and data specified in the SNAc must be submitted to Environment & Climate Change Canada 90 days before the activity begins.

CAS RN Common/pesticide name
1951-03-06 Piperonyl butoxide
62-73-7 Dichlorvos
1976-06-02 Chloropicrin
87-90-1 Trichloro-s-triazinetrione
88-30-2 TFM (3-Trifluoromethyl-4-nitrophenol)
94-75-7 2,4-D (2,4-Dichlorophenoxyacetic acid)
133-06-2 Captan
133-07-3 Folpet
333-41-5 Diazinon
584-79-2 Allethrin
2921-88-2 Chlorpyrifos
8001-58-9 Creosote
8003-34-7 Pyrethrins
10453-86-8 Resmethrin
10605-21-7 Carbendazim
12069-69-1 Copper carbonate, basic
13356-08-6 Fenbutatin-oxide
20543-04-8 Copper Octanoate
23564-05-8 Thiophanate-methyl

The SNAc Notices do not apply to any use of the substance that is regulated under the Pest Control Products Act, the Fertilizers Act, or the Feeds Act.


  • Do you know if your product and product use is regulated under Pest Control Products Act, the Fertilizers Act, or the Feeds Act?
  • Do you know how to find the Significant New Activity (SNAc) Notice?
  • Do you know how to respond to a Significant New Activity (SNAc) Notice?

Dell Tech
Joe McCarthy, Senior Regulatory Affairs Specialist

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