EPA to Restrict Use of Dichloromethane, Proposes Restrictions on n-Methylpyrrolidone

July 25, 2024 - G. Cottrell

The U.S. Environmental Protection Agency (EPA) has finalized a rule to restrict most uses of dichloromethane (DCM) to protect workers and communities from harmful exposure. Additionally, the EPA has proposed restrictions on n-methylpyrrolidone (NMP) in the near future.

The EPA's rationale includes DCM's links to cancer and neurotoxicity, with 88 worker deaths since 1980. Concerns about NMP include fetal loss from short-term exposure and fertility impacts from long-term exposure.

Key Points

• Consumer uses and most industrial/commercial applications, including paint and coating removers will be banned.
• Exemptions for laboratory use of DCM and NMP require workplace protections like air monitoring, exposure limits enforcement, and documented worker training.
• Consumer uses of DCM and NMP will be phased out within 1 year, and most industrial/commercial uses within 2 years.

MSU Response

In response to the EPA ruling, the MSU's Office of Environmental Health and Safety will assist departments in achieving compliance over the next year. Updates will be provided via email and the EHS website. Users of DCM and NMP will be contacted to:

• Dispose of unwanted DCM and NMP.
• Enroll laboratories in EPA's Workplace Chemical Protection program.
• Provide training and exposure monitoring.
• Offer alternative product lists for researchers.

More Information

• EPA fact sheet on DCM (PDF)
• EPA final risk evaluation on NMP

For questions, contact Genevieve Cottrell, Chemical Safety Officer. Continue to monitor the EHS website and add ehs@msu.edu to your safe-sender list for updates.