Consultation on Copper (present as cuprous thiocyanate) and Its Associated End-use Products, Proposed Re-evaluation Decision PRVD2018-18

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The online consultation is now closed.

Copper (present as cuprous thiocyanate; also known as copper thiocyanate) is used in antifouling paint applied to boats. Health Canada is proposing products containing copper thiocyanate are acceptable for continued registration for both commercial and domestic uses in Canada, provided that required label updates are made to meet the current labelling standard to protect human health and the environment.

With respect to human health, risks are acceptable due to the low toxicity of copper thiocyanate and the low potential for exposure expected when the product is applied according to the label directions.

Aquatic environments are expected to be exposed to copper leachates from boats treated with copper thiocyanate based paint. When used as directed, potential risk to the aquatic environment from copper thiocyanate based antifouling paints is acceptable.

A list of products containing Copper (present as cuprous thiocyanate) can be found in the Pesticide Label Search database.

For more information on the proposed decision open the “Proposed Re-evaluation Decision”.

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Reporting to Canadians

Health Canada will make the results of this consultation available on this website. Once the decision is finalized, the PMRA will post a Re-evaluation Decision on the Pesticides and Pest Management Reports and Publications portion of

If you have any questions, contact the Pest Management Information Service.

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