Closed consultation: Proposal to control certain fentanyl precursor chemicals and carisoprodol under the Controlled Drugs and Substances Act

From: Health Canada

On February 14, 2025, Health Canada published a Notice of Intent proposing to control certain fentanyl precursor chemicals and the drug carisoprodol under the Controlled Drugs and Substances Act (CDSA).

Canada is proposing to control, under the CDSA, the following precursor chemicals that can be used to illegally produce fentanyl:

• phenethyl bromide
• propionic anhydride (also known as propanoyl propanoate)
• benzyl chloride

Canada is also proposing to control, under the CDSA, the following substance:

• carisoprodol (2-((carbamoyloxy)methyl)-2-methylpentyl isopropylcarbamate)

Controlling these substances would help disrupt the production and supply of illegal drugs, both in Canada and internationally.

Health Canada sought information on any known uses of these chemicals.

Who was the focus of this consultation

Health Canada sought comments from:

• Canadian industries using these substances
• licensed dealers of controlled substances
• licensed and registered dealers of precursors
• law enforcement
• researchers working with these substances
• interested members of the public

Related information

• Controlled Substances and Precursor Chemicals
• Controlled Drugs and Substances Act

Contact us

Office of Legislative and Regulatory Affairs
Controlled Substances and Overdose Response Directorate
Health Canada
Email: csd.regulatory.policy-politique.reglementaire.dsc@hc-sc.gc.ca