On June 24, 2023, the Science and Risk Assessment Directorate of Environment Canada published a notice in the Canada Gazette, the Canadian equivalent of the United States Federal Register, that enumerated a mandatory information request for 850 chemical substances for the purpose of assessing whether these substances are toxic or are capable of becoming toxic, or for the purpose of assessing whether to control or the manner in which to control the listed substances under the  Chemicals Management Plan — 2023. The notice details the information that manufacturers, importers, and users of the identified substances will be required to submit.

These 850 substances at issue are divided into four categories:

In the notice, Environment Canada grouped reporting requirements by threshold, concentration, and intended use. Reporting is required for substances present at a concentration greater than or equal to 0.1 percent in a mixture or product. In addition, reporting is required for substances present in certain manufactured items (defined as items that are formed into a specific physical shape or design during manufacture and have, for their final use, a function or functions dependent in whole or in part on its shape or design) including products:

Reporting is not required for substances covered by other regulations, including substances that is or is contained in:

Additionally, there are exemptions for tetrachloroethylene used in specific situations, such as solvent degreasing and used in dry cleaning. Substances solely in transit through Canada will also be exempt.

Information required includes the concentration, or range of concentrations, of the substance by in goods, where applicable; substance functions; information on commercial and consumer, including use by children; and the title(s) of any unpublished data or studies related to the substance that has not already been provided to the Government of Canada.

Responses are due by January 17, 2024, and must be submitted using the online reporting system available through Environment and Climate Change Canada’s Single Window.