Re-evaluation Decision RVD2026-01, Sulphur and its associated end-use products

Health Canada
Healthy Environments and Consumer Safety Branch
Pesticides Regulatory Directorate
23 April 2026
ISSN: 1925-1025 (PDF version)
Catalogue number: H113-28/2026-1E-PDF (PDF version)

Summary

Table of contents

• Re-evaluation decision for sulphur and associated end use products
• Re-evaluation decision for sulphur
• Risk mitigation measures
• Implementation of the re-evaluation decision
• Amendment timeframe
• Next steps
• Other information
• Appendix I  Registered products containing sulphur in Canada

Re-evaluation decision for sulphur and associated end use products

Under the authority of the Pest Control Products Act, all registered pesticides must be re-evaluated by Health Canada to ensure that they meet current health and environmental standards and have value. The re-evaluation considers data and information from pesticide manufacturers, incident reports, and other regulatory agencies, as well as comments directly related to the proposed re-evaluation decision, such as comments directed to the Science evaluation, received during public consultations. Health Canada applies internationally accepted risk assessment methods as well as current risk management approaches and policies. More details, on the legislative framework, risk assessment and risk management approach, are provided under the Evaluation approach Section of the full version of document Re-evaluation Decision RVD2026-01, Sulphur and Its Associated End-use Products.

Sulphur is an inorganic, multi-site fungicide which belongs to the Fungicide Resistance Action Committee Mode of Action (MoA) Group M2. It is a non-systemic, protective fungicide with contact and vapour action. As a multi-site fungicide, sulphur is generally considered as having a low risk for favouring resistance development in susceptible fungal pathogens. Sulphur also has secondary acaricide activity. It works by disrupting respiration and other cellular activity in susceptible mites or ticks. Sulphur vapour (sulphur oxides) is registered as a fumigant for vertebrate control and works by asphyxiation.

Sulphur is registered as a fungicide, insecticide, and acaricide for commercial and domestic uses, and as a rodenticide in domestic settings. Commercial class end-use products containing sulphur are used for the control or suppression of various fungal pathogens and insects on a wide variety of field and greenhouse agricultural crops. Domestic class products are used to control various fungal pathogens and insects on outdoor ornamentals, fruits and vegetables, and indoor plants. One domestic class end-use product is registered to control ground squirrels, moles, pocket gophers, woodchucks (marmots), Norway rats, and skunks.

Currently registered products containing sulphur can be found in the Pesticide Product Information Database and in Appendix I. The Proposed Re-evaluation Decision PRVD2025-07, Sulphur and Its End-use Products^{Footnote 1} containing the evaluation of sulphur and proposed decision, underwent a 90 day consultation period ending on 8 September 2025. PRVD2025-07 proposed continued registration of sulphur and all associated end-use products in Canada, with updates to label directions and precautions to reflect the current labelling standards and improve clarity (Appendix II of RVD2026-01). Risk mitigation measures included limiting the application of sulphur for use on cannabis grown in greenhouses or other enclosed growing structures only during the vegetative stage, a drift statement for all commercial class end-use product labels with outdoor uses to minimize potential for spray drift to residential areas, and updates to precautionary label statements as per current labelling standards such as PPE, restricted-entry interval, storage, and disposal.

Comments were received during the public consultation period conducted in accordance with section 28 of the Pest Control Products Act. However, none were directly related to the proposed re-evaluation decision in PRVD2025-07, Proposed Re-evaluation Decision for Sulphur and Its Associated End-use Products. Therefore, this decision is consistent with the proposed re-evaluation decision as described in PRVD2025-07.

A reference list of information used as the basis for the proposed re-evaluation decision is included in PRVD2025-07; no further information was used in the final re-evaluation decision. Therefore, the complete reference list of all information used in this final re-evaluation decision is set out in PRVD2025-07.

This document (RVD2026-01) presents the final re-evaluation decision^{Footnote 2} for the re-evaluation of sulphur, including the required amendments (risk mitigation measures) to protect human health and the environment, as well as label amendments required to bring labels to current standards. All products containing sulphur that are registered in Canada are subject to this re-evaluation decision.

Re-evaluation decision for sulphur

Health Canada has completed the re-evaluation of sulphur. Under the authority of the Pest Control Products Act, Health Canada has completed all required evaluations and consultations and has determined that the registration of products containing sulphur is required to be amended, in accordance with paragraph 21(2)(a) of the Pest Control Products Act. An evaluation of available scientific information respecting the health and environmental risks and value of sulphur found that all uses of sulphur products meet current standards for protection of human health and the environment and have acceptable value when used according to the amended conditions of registration which includes new mitigation measures. Label amendments, as summarized below and listed in Appendix II of RVD2026-01, are required.

Risk mitigation measures

Registered pesticide product labels include specific directions for use. Directions include risk mitigation measures to protect human health and the environment and must be followed by law. The required amendments, including any revised/updated label statements and/or mitigation measures, as a result of the re-evaluation of sulphur, are summarized below. Refer to Appendix II of RVD2026-01 for details.

Human health

Label improvements to meet current standards:

• Updates to labels to reflect current standards, including use directions and precautions such as PPE, restricted-entry interval, and storage.

Risk mitigation:

To protect workers and those entering treated areas from exposure, the following risk-reduction measures are required for continued registration of sulphur in Canada:

• Application of sulphur is permitted for use on cannabis grown in greenhouses or other enclosed growing structures only during the vegetative stage.
• A standard spray drift statement is required for all commercial class end-use product labels with outdoor uses to minimize potential for spray drift to residential areas.

Environment

Label improvements to meet current standards:

• Updates to labels to reflect current standards for environmental precautions, use directions, and disposal.

Implementation of the re-evaluation decision

Regulatory Directive DIR2018-01, Policy on Cancellations and Amendments Following Re-evaluation and Special Review provides information and general timelines regarding the implementation of post-market decisions, (for example, up to 24-month timeline for label amendments and up to 36-month phase-out timeline for cancelled registrations), and Information Note: Update on implementation of post-market decisions provides additional information on phase-out measures for post-market decisions that include cancellations. The post-market decision considers potential health and environmental risks regarding the use of the pest control product, and its value, when establishing the implementation timelines.

Amendment timeframe

The implementation timeline of 24 months for the required amendments (mitigation measures and label updates) for pest control products containing sulphur is considered acceptable. These required amendments must be implemented within 24 months after the publication date of RVD2026-01. 

Refer to Appendix I for details on specific products impacted by this decision.

Next steps

To comply with this decision, the required amendments (mitigation measures and label updates) must be implemented on all product labels no later than 24 months after the publication date of RVD2026-01. Accordingly, both registrants and retailers will have up to 24 months from the date of RVD2026-01 to transition to selling the product with the newly amended labels. Similarly, users will also have the same 24-month period from the date of this decision document to transition to using the newly amended labels, which will be available on the Public Registry .
Refer to Appendix I for details on specific products impacted by this decision.

Other information

The relevant confidential test data on which the decision is based (as referenced in PRVD2025-07) are available for public inspection, upon application, in Pesticides Regulatory Directorate’s Reading Room. For more information, please contact the Pesticides Information Service .

Any person may file a notice of objection,^{Footnote 3} which must be based on scientific grounds, regarding this decision on sulphur and its associated end-use products within 60 days from the date of publication of this Re-evaluation Decision through the Public Engagement Portal (Public Engagement Forms - Notice of Objection ). The request for reconsideration must include the Notice of Objection form, the scientific explanation of the objection and the supporting scientific evidence in possession of the requestor that would not already be in the Health Canada’s possession or cite specific Pesticides Regulatory Directorate documentation they wish to rely on as supporting evidence (for example, scientific reports) in the form of electronic copies of cited references. Each of the references provided or cited must be clearly associated with the objection it supports. Failure to provide a complete package may result in the Notice of Objection being considered ineligible for further consideration by the Pesticides Regulatory Directorate. For more information regarding the basis for objecting (which must be based on scientific grounds), please refer to the Pesticides and Pest Management portion of the Canada.ca website or contact the Pesticides Information Service.

Appendix I Registered products containing sulphur in Canada

Table 1 Products containing sulphur requiring label amendments^{Table 1 Footnote 1}

Registration number	Marketing classTable 1 Footnote 2	Registrant	Product name	Formulation type	Active ingredient (%, g/L)Table 1 Footnote 2
18569	T	BASF Agricultural Solutions Canada Inc.	BASF Technical Kumulus	Dust or powder	SUL-99
21779	T	376896 Ontario Ltd.	Hollysul Technical Sulphur	Solid	SUL-99.9
29486	T	UPL Agrosolutions Canada Inc.	Microthiol® Technical	Wettable granules	SUL-99.7
31868	T	SML Limited	Sulphur Mills Technical Sulphur	Solid	SUL-99.8
34550	T	Andermatt Canada	Cerasulfur Technical	Solid	SUL-99.9
25144	M	Georgia Gulf Sulfur Corp.	Yellow Jacket Fluid Sulfur 70 SD	Emulsifiable concentrate or emulsion	SUL-70.0
12269	D	TM-RM INC DBA Atlas Chemical Corp.	The Giant Destroyer	Granular	SUL-34.8
19061	D	Woodstream Canada Corporation	Safer’s Defender Garden Fungicide Ready to Use	Suspension	SUL-0.40
19691	D	Woodstream Canada Corporation	Safer’s Defender Garden Fungicide Concentrate	Suspension	SUL-12.0
19703	D	Woodstream Canada Corporation	Safer’s Sulphur Dust Fungicide Miticide	Dust or powder	SUL-92.0
21880	D	Premier Tech Ltd.	Green Earth BR Wilson Garden Fungicide Ready to Use	Suspension	SUL-0.9
21890	D	Premier Tech Ltd.	Green Earth by Wilson Garden Fungicide/Miticide	Wettable Powder	SUL-92
27894	D	Woodstream Canada Corporation	Safer’s 3-in-1 Garden Spray Fungicide, Insecticide & Miticide Ready-to-Use	Solution	SOC-0.75; SUL-0.40
29571	D	King Home & Garden Inc.	King Eco-Way Rose & Flower Fungicide Dust	Wettable powder	SUL-92
29572	D	King Home & Garden Inc.	King Eco-Way Fruit Tree & Garden Fungicide Spray or Dust	Wettable powder	SUL-92
33879	D	Woodstream Canada Corporation	Safer’s® Defender Garden Fungicide Ready to Use III	Suspension	SUL-0.40; SOC-0.79
34635	D	753146 Alberta Ltd. O/A Ultrasol Industries	Doktor Doom Premium Sulphur Fungicide for Fruits, Vegetables, Roses, Flowers and Ornamental Plants	Wettable powder	SUL-92
873	C	N.M. Bartlett Inc.	Bartlett Microscopic Wettable Sulphur	Wettable powder	SUL-92
14653	C	Loveland Products Canada, Inc.	Microscopic Sulphur Wettable Powder Fungicide	Wettable powder	SUL-92
16249	C	376896 Ontario Ltd.	Hollysul Micro-Sulphur	Wettable powder	SUL-92
18836	C	BASF Agricultural Solutions Canada Inc.	Kumulus DF Water Dispersible Granular Fungicide and Acaricide	Wettable granules	SUL-80
29487	C	UPL AgroSolutions Canada Inc.	Microthiol Disperss	Wettable granules	SUL-80
31869	C	SML Limited	Cosavet DF Edge	Wettable granules	SUL-80
34626	C	753146 Alberta Ltd. O/A Ultrasol Industries	Doktor Doom Premium Sulphur Fungicide	Wettable powder	SUL-92
34989	C	Andermatt Canada Incorporated	Cerasulfur	Suspension	SUL-70
Table 1 Footnote 1 As of 5 December 2025, excluding discontinued products or products with a submission for discontinuation. Table 1 Return to footnote 1 referrer Table 1 Footnote 2 C - commercial; D - domestic; M - manufacturing concentrate; T - technical grade active ingredient; SOC - potassium salts of fatty acids; SUL - sulphur. Table 1 Return to footnote 2 referrer