1,1,1-Trichloroethane (Methyl chloroform)

Methyl chloroform is a chemical compound consisting of carbon, hydrogen, and chlorine. It was widely used as a solvent in cleaners, degreasers and adhesives, and in the electronics and equipment manufacturing industries.

As methyl chloroform 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, methyl chloroform is subject to the Ozone Depleting Substances and Halocarbon Alternatives Regulations, which prohibit the production, import and export of methyl chloroform, except for very limited and specific applications.

CAS (Chemical Abstract Service) registry number: 71-55-6

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
• Integrated steel mills: code of practice
• Non-Integrated steel mills: code of practice

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