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ARTICLE · 02 SEPTEMBER 2026

Is The Mixture Assessment Factor Still On The REACH Agenda?

Bergeson & Campbell
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The European Commission has shelved plans for a comprehensive REACH revision, but technical amendments remain possible. One initiative still under consideration is the Mixture Assessment Factor (MAF), which would address combined chemical exposure risks—a recognized gap in current EU chemical safety regulations.

European UnionEnvironment
Karen L. Lorusso
Karen L. Lorusso
Christine M. Palermo
Christine M. Palermo
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Following the April 27, 2026, European Parliament Environmental Committee announcement that the European Commission (EC) would not proceed with a legislative proposal for a comprehensive revision of the European Union’s (EU) Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) Regulation, major reforms — such as the registration of polymers — appear to be off the table. Technical amendments to the REACH Annexes through comitology remain possible, however, although it is not yet clear which of the proposed initiatives previously identified by the EC will be taken forward.

One initiative that may still be worth watching is the Mixture Assessment Factor (MAF). On August 19, 2026, the EC’s Directorate-General for Environment (DG ENV) highlighted academic research supporting the consideration of the MAF in the REACH risk assessment framework.

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