Toxic substances list: hexachlorobutadiene
Hexachlorobutadiene, or HCBD, has never been commercially produced in Canada. Formerly, the substance was imported into Canada for use as a solvent, but it is no longer imported. There are no natural sources of HCBD in the environment.
CAS (Chemical Abstracts Service) registry number: 87-68-3
For more information on this substance, please visit the Chemical Substances website.
- Priority Substances List Assessment Report
- Addition of Hexachlorobutadiene to the Virtual Elimination List
- CEPA 1999 Schedule 1 - List of Toxic Substances - This substance has been added to the List of Toxic Substances. It is entering or may enter the environment in a quantity or concentration or under conditions that: a) have or may have an immediate or long-term harmful effect on the environment or its biological diversity.
- Virtual elimination of the substance (Track 1) under the Toxic Substances Management Policy
This substance is entering the environment from the following source(s):
Risk Management Strategy
Click on the following link to view strategies and actions recommended to manage risks associated with the substance:
Risk Management Tool(s)
Tool(s) developed to manage risks associated with the substance:
Risk Management Supporting Activities
Activities supporting the development or implementation of the risk management tool(s):
Forms related to the Prohibition of Certain Toxic Substances Regulations, 2012:
Consultation (past and present) on the substance:
- Environment Canada's Response to Comments resulting from the Canada Gazette, Part I publication of the proposed addition of hexachlorobutadiene (HCBD) to the Virtual Elimination List
- Proposed Regulations Respecting the Total, Partial and Conditional Prohibition of Certain Toxic Substances (archived consultation document)
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