Canada Adopts Significant-New-Activity Controls For TMTD

Canada has adopted SOR/2026-208, applying significant-new-activity controls to TMTD, also known as thiram, under the Canadian Environmental Protection Act, 1999. The order was registered on 9 October 2026 and published in the Canada Gazette on 21 October. Order and explanatory statement.

Activities Above 100 Kilograms

The controls cover manufacture of TMTD, CAS 137-26-8, in quantities exceeding 100 kilograms in a calendar year. They also cover its use to manufacture liquid-rubber or latex products where the total used across those products exceeds 100 kilograms in a calendar year. Research-and-development substances, as defined in the applicable notification regulations, are exempt. Order, section 2.

For each proposed significant new activity, the specified information must reach the minister at least 180 days before the activity starts. The order takes effect on the 180th day after registration. These are separate timing requirements. Order, sections 2–3.

Earlier Environmental Assessment

The January 2021 Thiocarbamates Group assessment concluded that TMTD met the environmental-harm criterion in paragraph 64(a) of CEPA. It identified potential risks to aquatic organisms from releases associated with solid-rubber manufacturing. Screening assessment, synopsis.

The new order's explanatory statement links the notification controls to concern about increased exposure from new activities. It says the order imposes no regulatory requirements on existing Canadian activities involving TMTD that have been determined to present no or limited risk, or are adequately managed. Regulatory impact statement, issues and description.