Bromochloromethane (Halon 1011)

Halons are organic, synthetic (i.e., human-made) chemicals. Halon 1011 contains chlorine, bromine, carbon and hydrogen. Historically, the substance was intended for use in fire suppression and solvent applications, but found very little use, partly due to its toxicological properties and ozone-depleting potential. It is believed that Halon 1011 is currently used only as a feedstock and process agent to manufacture other chemicals.

As Halon 1011 was found to deplete the stratospheric ozone layer, it became subject to a global phase-out under an international agreement: the Montreal Protocol on Substances that Deplete the Ozone Layer.

In Canada, Halon 1011 is subject to the Ozone Depleting Substances and Halocarbon Alternatives Regulations, which prohibit the production, import and export of Halon 1011, except for very limited and specific applications.

CAS (Chemical Abstract Service) registry number: 74-97-5

Risk Assessment

• CEPA 1999 Schedule 1 - List of Toxic Substances - This substance has been added to the List of Toxic Substances.
• Full life cycle management of the substance (Track 2) under the Toxic Substances Management Policy

Risk Management Tool(s)

Tool(s) developed to manage risks associated with the substance:

• Federal Halocarbon Regulations, 2022
• Ozone-depleting Substances and Halocarbon Alternatives Regulations

International engagement

• Montreal Protocol on Substances that Deplete the Ozone Layer

Other Information

• Ozone layer
• National Pollutant Release Inventory (NPRI)
• Environmental code of practice on Halons
• Halon in fire-extinguishing systems

Contact

Ozone Protection Programs
Environment and Climate Change Canada
351 Saint-Joseph Boulevard
Gatineau QC  K1A 0H3
Telephone: 819-938-4228
Email: halocarbures-halocarbons@ec.gc.ca