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Council of the EU Adopts its Position on Sixth Revision of the Carcinogens, Mutagens and Reprotoxic Substances Directive with New Exposure Limits
On 1 December 2025, the Council of the European Union agreed its position on the sixth update of the Carcinogens, Mutagens and Reprotoxic Substances Directive (CMRD). The revision introduces new binding occupational exposure limits, updates Annex I and reflects the latest scientific advice in order to strengthen the protection of workers exposed to hazardous substances.
New Substance Limits and Additions
The Council’s position confirms new or updated limits for several substances and processes. These include:
- Cobalt and inorganic cobalt compounds
- Polycyclic aromatic hydrocarbons (PAHs), measured as benzo[a]pyrene
- 1,4-dioxane, including a biological limit value
- Isoprene, with a new EU-level occupational exposure limit
- Welding fumes containing category 1A or 1B carcinogens, mutagens or reprotoxic substances
The revision also updates the definitions of carcinogens, mutagens and reprotoxic substances, reflecting scientific developments and accommodating the inclusion of welding fumes as a process covered by the directive.
Next Steps
The file will now move to the European Parliament, which will establish its position before the start of the trilogue negotiations. Transitional periods are planned for sectors where immediate compliance may be difficult. According to the Council, the revised limits and updated rules could prevent approximately 1,700 lung cancer cases and 19,000 other serious health conditions over the next 40 years.
We acknowledge that the above information has been compiled from Council of the EU.
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