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


This substance is entering the environment from the following sources:

Risk Management Strategy

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

Risk Management Tools

Tools developed to manage risks associated with the substance:


Chemicals Management Division
Environment and Climate Change Canada
Gatineau QC  K1A 0H3


Substances Management Information Line:
Telephone: 1-800-567-1999 (in Canada) or 819-938-3232
Fax: 819-938-3231

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