Toxic substances list: hexachlorobutadiene (HCBD)

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.

Risk assessment

• 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

Sources

This substance is entering the environment from the following sources:

• Industrial, Commercial and Consumer Products

Risk management strategy

Click on the following link to view strategies and actions recommended to manage risks associated with the substance:

• Risk Management Strategy - Hexachlorobutadiene (HCBD)

Risk management tools

Tools developed to manage risks associated with the substance:

• Prohibition of Certain Toxic Substances Regulations, 2012
• Virtual Elimination List

Consultation

Consultation (past and present) on the substance:

• Share your thoughts: Draft Update to Canada’s National Implementation Plan under the Stockholm Convention on Persistent Organic Pollutants

Other information

• Prohibition of Certain Toxic Substances Regulations, 2005 (Repealed)
• The Great Lakes Binational Toxics Strategy