What: On October 9, 2025, the U.S. Environmental Protection Agency (EPA) announced it is reconsidering the way carbon tetrachloride (CTC) is regulated under the Toxic Substances Control Act (TSCA).
Why: CTC is primarily used as a feedstock to make products such as refrigerants, aerosol propellants, and foam-blowing agents. Prior regulations have resulted in a phaseout of CTC production in the United States for most non-feedstock domestic uses, such as degreasers and fire suppressants.
The EPA issued a final CTC rule on December 18, 2024, requiring various workplace exposure controls for most conditions of use, prohibiting certain industrial and commercial uses, and establishing other requirements.
The EPA is requesting comments on all aspects of the CTC final rule, including:
- Any existing or anticipated implementation issues associated with the final rule requirements.
- Experiences with the CTC final rule since it went into effect.
- Whether the Agency should consider additional or alternative measures or approaches to address the unreasonable risk presented by CTC under the conditions of use.
Specifically, the EPA is also asking for information on the Existing Chemical Exposure Limit of 0.03 parts per million (ppm) as an 8- hour time weighted average promulgated in the CTC final rule, including feasibility of exposure monitoring and whether the use of a different exposure limit would be more appropriate to inform risk management.
Action: Comments are due November 10, 2025.
FINAL CTC RULE:
Carbon Tetrachloride; Regulation Under the Toxic Substances Control Act
PROPOSED RULE:
Carbon Tetrachloride; Regulation Under the Toxic Substances Control Act; Request for Comment
CONTACT:
Nick Goldstein
EMAIL:
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